Creamy Copycat Costco Potato Salad

Craving the creamy, tangy goodness of Reser’s classic potato salad found in those massive tubs at Costco? Look no further! This comprehensive guide provides you with an incredible copycat recipe for Costco potato salad, allowing you to recreate that beloved taste right in your own kitchen. Say goodbye to the store-bought version and embrace the satisfaction of making your own homemade potato salad using simple, wholesome ingredients you trust. What’s more, this particular recipe is thoughtfully crafted to be both dairy-free and gluten-free, ensuring that everyone can indulge in this quintessential summer side dish without compromise.

Making your own Costco copycat potato salad isn’t just about replicating a flavor; it’s about elevating your culinary experience. It offers unparalleled control over what goes into your food, allowing for precise adjustments to suit various dietary preferences or restrictions. Opting for homemade means you’re always using the freshest, highest-quality ingredients, resulting in a superior taste and texture that ready-made options simply can’t match. This approach also proves to be more cost-effective, especially when you’re preparing for a large gathering, a family picnic, or a backyard barbecue. Beyond the practical benefits, there’s an immense joy in adding a personal touch to a familiar favorite, transforming a simple side into something truly special and memorable for any mealtime. This delightful, homemade potato salad has quickly become a summertime staple for my family. We love enjoying it at beach picnics, barbecue feasts, and potluck dinners. It’s truly the perfect companion to any warm-weather event!

a bowl of Copycat Reser's Potato Salad.
Table of Contents

Recipe Benefits (From a Nutritionist)

As a nutritionist, I often emphasize the profound advantages of preparing meals from scratch. While store-bought convenience foods like Costco’s potato salad can be tempting, taking the time to craft your own homemade potato salad offers a wealth of benefits that extend beyond just taste. Here’s why this copycat recipe stands out:

  • Tailored to Perfection: One of the greatest boons of making potato salad at home is the ability to customize. Whether you’re hosting an intimate backyard BBQ or catering to a large, elegant buffet, you can easily adjust the quantity, the creaminess, the tanginess, and even the “chunkiness” to perfectly match your preferences and the nature of your social gathering. This flexibility ensures your potato salad is always a crowd-plepleaser.
  • Dietary Inclusivity: This particular Costco potato salad copycat recipe is designed with dietary needs in mind. It’s inherently gluten-free and dairy-free, making it suitable for a wider range of guests who might have sensitivities or allergies. Furthermore, if you’re aiming for a vegan version, a simple swap to a plant-based mayonnaise is all it takes, without sacrificing flavor or texture. This adaptability is rarely found in pre-made options.
  • Enhanced Nutritional Value: When you control the ingredients, you control the nutrition. You can consciously choose high-quality components, such as organic potatoes, fresh, crisp celery, and a premium avocado-oil-based mayonnaise. Incorporating fresh herbs like parsley or dill not only boosts flavor but also adds a dose of antioxidants. By avoiding artificial preservatives, excessive sodium, and unhealthy fats often found in commercial dressings, you’re crafting a healthier dish that supports overall wellness. This means a cleaner, more nourishing potato salad for you and your loved ones.

Why Choose Homemade Over Store-Bought?

In a world of fast-paced living, the allure of grabbing a ready-made dish from the supermarket shelf is strong. However, when it comes to a classic like potato salad, the benefits of preparing it yourself are undeniable. Opting for a homemade Costco potato salad allows for a deeper connection to your food and offers numerous practical advantages.

Firstly, the control over ingredients is paramount. Store-bought versions, including large tubs like Reser’s at Costco, often contain a list of ingredients that includes various preservatives, stabilizers, and less desirable oils (like soybean or canola oil). By making your own, you can hand-pick fresh, high-quality potatoes, crisp vegetables, and a mayonnaise made with healthier fats, such as avocado oil. This not only enhances the flavor profile but also significantly improves the nutritional quality of your dish.

Secondly, homemade means unmatched freshness. Potato salad is at its best when the ingredients are vibrant and the dressing is just perfectly mixed. The crispness of fresh celery and onion, combined with perfectly cooked potatoes, creates a texture and taste experience that simply cannot be replicated by a product that has sat on a refrigerator shelf for days. The subtle nuances of flavor truly shine through.

Finally, there’s the economic benefit, especially when feeding a crowd. While the upfront cost of individual ingredients might seem comparable, making a large batch of homemade potato salad is generally more cost-effective than purchasing an equivalent quantity of a premium store-bought brand. You also avoid paying for packaging, marketing, and the convenience factor, channeling your budget directly into quality ingredients. Plus, the sense of accomplishment and the positive feedback from guests enjoying your handcrafted dish is priceless.

Costco's Reser's potato salad in the store refrigerator.

Key Ingredients for Our Copycat Recipe

Achieving that signature Costco Reser’s potato salad taste with a homemade touch relies on selecting the right ingredients and understanding their individual contributions. Each component plays a vital role in creating the perfect balance of flavor and texture that makes this dish so universally loved.

  • Gold or Yellow Potatoes: These varieties, such as Yukon Gold, are prized for their inherently buttery texture and a subtle sweetness that makes them an ideal foundation for potato salad. Their creamy flesh absorbs the dressing beautifully, ensuring every bite is rich and flavorful, yet they remain firm enough to hold their shape after cooking, preventing a mushy result.
  • Red Potatoes: Complementing the gold potatoes, red potatoes bring their own unique qualities to the mix. Known for their smooth, waxy texture, they are excellent at retaining their structural integrity even after boiling. This adds a delightful textural contrast to the creamier gold potatoes and contributes a vibrant pop of color, making the salad visually appealing and ensuring a pleasant mouthfeel with every spoonful.
  • Mayonnaise (Avocado-Oil Based): The choice of mayonnaise is crucial for the dressing’s creaminess and overall health profile. Opting for an avocado-oil-based mayonnaise not only delivers a luxuriously smooth and rich texture but also introduces healthier monounsaturated fats compared to many conventional store-bought options that often rely on less beneficial oils like canola or soybean. This choice enhances both flavor and wellness.
  • Yellow Mustard: A staple in classic potato salads, yellow mustard provides that essential tangy and sharp flavor that cuts through the richness of the mayonnaise. It adds a vibrant kick and a deeper layer of complexity, preventing the dressing from being overly sweet or bland, and contributing significantly to the traditional potato salad taste.
  • Sugar: While it might seem counterintuitive in a savory dish, a small amount of sugar is intentionally included to subtly enhance the overall flavor profile. It expertly balances the acidity of the mustard and vinegar, rounding out the sharp notes and bringing forward the natural sweetness of the potatoes and the pickle relish, creating a harmonious and well-rounded taste.
  • White Wine Vinegar: This ingredient is key to brightening the entire salad. White wine vinegar offers a mild, slightly fruity acidity that lifts and marries all the other flavors. It provides a refreshing counterpoint to the creamy dressing, contributing to the salad’s signature zest and making it feel light and inviting rather than heavy.
  • Celery and White Onion: These finely chopped vegetables add essential crunch and aromatic depth. Celery provides a refreshing crispness and a mild, peppery note, while the white onion contributes a sharp, pungent kick that is vital for balancing the creamy dressing and adding complexity to the overall flavor.
  • Sweet Pickle Relish: This ingredient is the secret weapon for that authentic deli-style, slightly sweet and tangy potato salad flavor. Sweet pickle relish brings a delightful blend of pickled cucumber pieces, a touch of sweetness, and a vinegary zing that perfectly ties together all the elements of the dressing and the potatoes.

Decoding Reser’s Costco Potato Salad Ingredients

To truly appreciate the advantages of our homemade Costco potato salad copycat recipe, it’s insightful to examine the ingredient list of the original Reser’s product available at Costco. Understanding what goes into the commercial version helps highlight the benefits of making it yourself, especially concerning control over quality and additives.

Here are the typical ingredients you’d find in the Costco Potato Salad made by Reser’s:

  • Potatoes
  • Mayonnaise (soybean oil, water, egg yolks, vinegar, and salt)
  • Sugar
  • Onion
  • Water
  • Apple cider vinegar
  • Salt
  • Vinegar
  • Modified corn starch
  • Onion powder
  • Sodium benzoate (preservative)
  • Potassium sorbate (preservative)

When comparing this list to our homemade recipe, several distinctions become clear. While both share core ingredients like potatoes, mayonnaise, sugar, and onion, the commercial version often uses soybean oil in its mayonnaise, which can be a concern for those seeking healthier fat options. More significantly, the presence of modified corn starch, onion powder (in addition to fresh onion), and chemical preservatives like sodium benzoate and potassium sorbate are notable. These additives are used to extend shelf life and maintain texture in a mass-produced product. Our homemade recipe, conversely, relies on fresh, whole ingredients, ensuring a “cleaner” label without sacrificing the classic taste you love.

Frequently Asked Questions (Recipe FAQs)

How long can I store leftover potato salad? 

Leftover potato salad, especially one with a mayonnaise-based dressing, should be handled with care. To ensure freshness and safety, store it promptly in an airtight container in the refrigerator. It will maintain its best quality for up to 3-4 days. It’s crucial to allow the salad to cool completely to room temperature before refrigerating. Never leave mayonnaise-based salads out at room temperature for more than 2 hours, as this can encourage bacterial growth.

What are some good additions or variations to this Costco potato salad recipe? 

While this recipe aims to be a precise Costco Reser’s copycat, feel free to customize it to your taste! For extra protein and heartiness, consider adding chopped hard-boiled eggs, diced ham, or crispy cooked bacon. Fresh herbs like finely chopped parsley, dill, or chives can introduce a wonderful burst of freshness and a vibrant aroma. For those who enjoy a bit more crunch and lightness, diced cucumbers or thinly sliced radishes are excellent additions. You could also experiment with different vinegars, like apple cider vinegar, for a slightly different tang.

Is Costco potato salad gluten-free? 

The good news is that this homemade potato salad recipe is naturally gluten-free, as all the ingredients specified are free from gluten-containing grains. When it comes to the Reser’s version of potato salad sold at Costco, the manufacturer’s stance is more cautious. Their website generally states that due to the wide range of products made in their facilities, they cannot guarantee a “gluten-free” manufacturing environment for any single product. Therefore, they choose not to make gluten-free claims. They advise customers to review each ingredient listed on the packaging label to make an informed choice based on their individual needs.

Is Costco potato salad vegan?

The prepared Reser’s brand potato salad sold at Costco is not vegan, primarily because the mayonnaise used in their recipe contains eggs. However, if you’re looking to enjoy a delicious vegan potato salad, this copycat recipe can easily be adapted. Simply follow the instructions and substitute traditional mayonnaise with your favorite high-quality vegan-based mayonnaise. All other ingredients in our homemade recipe are plant-based, making it a simple and effective swap.

What kind of potatoes are best for potato salad?

For the best Costco potato salad copycat texture, it’s recommended to use a combination of waxy potatoes (like red potatoes) and slightly starchier, creamier potatoes (like gold or Yukon Gold). Waxy potatoes hold their shape well after cooking, preventing a mushy salad, while the gold potatoes contribute to the creamy consistency and soak up the dressing beautifully. Avoid very starchy potatoes like Russets, as they tend to fall apart easily.

Can I make this potato salad ahead of time?

Absolutely! Potato salad often tastes even better the next day, as the flavors have more time to meld and deepen in the refrigerator. We recommend making it at least 1 hour in advance, but preparing it overnight (8-12 hours) yields the most satisfying results. Just be sure to give it a good stir before serving, as some of the dressing might settle at the bottom.

How can I adjust the tanginess or sweetness?

Achieving the perfect balance is key in any homemade potato salad. If you prefer a tangier salad, you can add an extra half teaspoon of white wine vinegar or a squeeze of fresh lemon juice. For a sweeter profile, an additional half teaspoon of sugar can be stirred in. Always taste and adjust incrementally until you reach your desired flavor.

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a bowl of Costco's copycat potato salad.

Costco Potato Salad (Copycat Reser’s Recipe)


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Print Recipe

Get ready to impress your friends and family with this incredible Costco potato salad copycat recipe! It perfectly captures the creamy, tangy, and slightly sweet flavor of the beloved Reser’s brand potato salad sold in bulk at Costco. Made with wholesome ingredients, this homemade version is not only delicious but also naturally dairy-free and gluten-free, ensuring everyone can enjoy a generous scoop of this classic side dish. It’s an ideal choice for your next picnic, potluck, or barbecue, offering a fresh and healthier alternative to store-bought options.



  • Total Time:
    60 Minutes


  • Yield:
    8 Servings 1x

Ingredients


Units


Scale

  • 1.5 pounds gold or yellow-skinned potatoes, scrubbed and quartered into uniform pieces
  • 1.5 pounds red potatoes, scrubbed and quartered (approximately 8-12 medium-sized red potatoes for best results)
  • 1 cup mayonnaise (For a healthier and dairy-free option, an avocado-oil-based mayonnaise is recommended, but feel free to use your favorite brand)
  • 1 tablespoon classic yellow mustard, for that essential tangy kick
  • 1 tablespoon granulated sugar, to balance the flavors
  • 1 teaspoon white wine vinegar, to brighten the dressing
  • 1/2 teaspoon sea salt, or to taste
  • 2 celery stalks, finely chopped for crunch and freshness
  • 1/4 of a medium-sized white onion, very finely chopped to provide subtle sharpness
  • 1/4 cup sweet pickle relish, for that signature tangy-sweet element

Instructions

  1. Begin by preparing your potatoes. Combine both the gold (or yellow-skinned) and red potatoes in a large, sturdy pot. Add enough cold water to generously cover all the potatoes by at least an inch. Place the pot over medium-high heat and bring the water to a rolling boil. Once boiling, reduce the heat to maintain a gentle simmer and cook for 10-15 minutes, or until the potatoes are fork-tender but still hold their shape without becoming mushy. Drain the cooked potatoes thoroughly and allow them to cool slightly on a baking sheet to release excess steam, which helps prevent a watery salad.
  2. While the potatoes are cooling, prepare the creamy dressing. In a separate medium-sized bowl, whisk together the mayonnaise, classic yellow mustard, granulated sugar, white wine vinegar, and sea salt. Continue whisking until the mixture is completely smooth and well combined, ensuring all the flavors are evenly distributed. Taste the dressing and adjust seasonings as needed, adding more salt, sugar, or vinegar to achieve your desired balance of sweet and tangy.
  3. In a very large mixing bowl, gently combine the slightly cooled, cooked potatoes with the finely chopped celery, the finely chopped white onion, and the sweet pickle relish. Take care not to mash the potatoes; you want them to remain in distinct, tender pieces for the best texture.
  4. Pour the prepared creamy dressing over the potato mixture. Using a large spatula or spoon, gently fold and stir all the ingredients together. Continue mixing until every potato piece and vegetable is thoroughly coated with the dressing. Ensure the dressing is evenly distributed without over-mixing, which could break down the potatoes.
  5. Cover the bowl tightly with plastic wrap or transfer the potato salad to an airtight container. Refrigerate the potato salad for a minimum of 1 hour to allow the flavors to meld and deepen. For the best possible taste and texture, chilling the salad overnight is highly recommended, as it truly allows the ingredients to harmonize.
  6. Before serving, remove the potato salad from the refrigerator and give it a gentle stir once more to redistribute any dressing that may have settled. Serve chilled as a refreshing side dish for your barbecue, picnic, or family meal. Enjoy your perfectly crafted, homemade Costco potato salad!

Notes

  1. Please note that the total cook time listed does not account for the chilling period required for the potato salad before serving. If you plan to serve it chilled, which is highly recommended for optimal flavor, allow for an additional minimum of 1 hour (preferably overnight) for refrigeration.
  2. While this recipe calls for a blend of red and gold potatoes to closely mimic the Reser’s classic recipe, you can certainly use just one type of potato if you prefer. Just ensure they are waxy or all-purpose varieties that hold their shape well after cooking.
  3. For an extra layer of flavor and aroma, consider adding a pinch of freshly chopped dill or parsley to the dressing mixture or as a garnish before serving.
  4. Always taste your potato salad before serving and adjust the salt, sugar, or vinegar as needed. Personal preference plays a big role in the perfect balance.
  • Author: Carrie Forrest, MPH in Nutrition
  • Prep Time: 30 Minutes
  • Cook Time: 15 Minutes
  • Category: Side Dish
  • Method: Stovetop
  • Cuisine: Healthy
  • Diet: Gluten Free

Nutrition

(Nutritional values are estimates and may vary based on specific ingredients used.)

  • Serving Size: 1/8 of recipe
  • Calories: 320
  • Sugar: 4.6 g
  • Sodium: 383 mg
  • Fat: 20.9 g
  • Saturated Fat: 3.3 g
  • Carbohydrates: 30.2 g
  • Fiber: 4.1 g
  • Protein: 3.6 g
  • Cholesterol: 11.6 mg

More Wholesome Salad Recipes You’ll Love

If you enjoyed crafting this homemade Costco potato salad and are on the hunt for more fresh, healthy, and delicious salad ideas, you’ve come to the right place! Salads are incredibly versatile, perfect for light lunches, hearty dinners, or crowd-pleasing side dishes. Explore these additional recipes that focus on clean ingredients and vibrant flavors, ensuring you always have a wholesome option for any occasion.

  • Dairy-Free Ambrosia Salad: A delightful, creamy fruit salad that’s naturally dairy-free and perfect for a sweet, refreshing treat.
  • Potato Salad without Eggs: A fantastic alternative for those with egg allergies or preferences, this recipe offers all the classic potato salad flavor without eggs.
  • Healthy Tuna Pasta Salad: A lighter, yet satisfying pasta salad packed with protein and fresh vegetables, ideal for meal prep or a quick lunch.
  • Costco Quinoa Salad (Copycat): Another popular Costco item recreated at home, this quinoa and chickpea salad is hearty, flavorful, and loaded with plant-based goodness.
  • Lentil & Wild Rice Salad: A protein-rich and fiber-packed salad, perfect for a nutritious and filling meal, offering unique textures and earthy flavors.
  • Watermelon Beet Salad: A surprisingly refreshing and vibrant salad that combines the sweetness of watermelon with earthy beets for a unique taste experience.

Essential Summer Side Dishes! These Recipes Are Perfect For Any Gathering

Summer is synonymous with vibrant flavors, refreshing drinks, and delicious side dishes that complement any outdoor gathering. Whether you’re hosting a barbecue, enjoying a picnic at the park, or simply looking for light and healthy options to beat the heat, these recipes are absolute must-tries. From hydrating beverages to delightful desserts and more salads, elevate your summer menu with these fantastic clean-eating ideas.

15+ Hydrating Summer Juice Recipes
10 Refreshing Vegan Summer Desserts
10 Delicious Gluten-Free Summer Salads
10 Healthy & Hydrating Summer Smoothies

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About the Author: Carrie Forrest holds a master’s degree in public health with a specialized focus on nutrition and is a certified holistic nutritionist. She is a highly respected wellness and food blogger, attracting over 5 million visitors to her website annually. Carrie’s inspiring journey of recovery from chronic illness fuels her passion for empowering other women to transform their health through wholesome food choices and sustainable lifestyle changes. Feel free to send her a message through her contact form to connect and share your health journey.