The 3-Ingredient Costco Potato Salad I Make Over and Over (Everyone Devours It!)

published May 24, 2024
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potato salad with corn and cilantro lime crema in a bowl
Credit: Kelli Foster

Summer is on the horizon, and that means pool parties, barbecues, picnics, and potlucks. Casual get-togethers like these are the best when everyone brings something to share at the table. This simple three-ingredient pasta salad made with all Costco ingredients was my go-to contribution last summer. This year, I’m switching it up for a potato salad that is just as easy and delicious. 

This Costco potato salad also uses just three ingredients and takes less than 10 minutes to make. With pre-roasted potatoes, sweet summer corn, and a creamy, tangy dressing, everyone will beg you for the recipe.  

Credit: Kelli Foster

Ingredients Needed for the Costco Potato Salad

Like I said, this ingenious Costco potato salad relies on three of the hardest-working groceries, all found at the beloved warehouse.

  • Main Street Bistro Oven Roasted Potatoes: Baby red and yellow potatoes are sliced, seasoned with sea salt and black pepper, and roasted. Find them in the refrigerated section.
  • Fresh Corn: Sold in packs of eight ears in the produce cooler, you’ll use kernels from two to three ears for this potato salad, and can save the rest for other summer corn recipes
  • Don Pancho Cilantro Lime Crema: This sauce is made from cilantro, lime, and sour cream. (If you’re not a huge cilantro fan, like me, don’t worry. The cilantro adds color and fresh flavor to the sauce, but isn’t overwhelming.) If you think it tastes familiar, you’re right. It is the same sauce used in Costco’s ready-to-eat street tacos.
Credit: Kelli Foster

How to Make the Costco Potato Salad

  • Dice the potatoes. The Main Street Bistro Oven Roasted Potatoes are already sliced, seasoned, and roasted. If you prefer chunky potato salad over sliced, give each slice a rough chop into about 3/4-inch pieces. The potatoes are packed in two (20-ounce) trays; use both to make this potato salad for large gatherings.
  • Cut corn kernels from the cob. Remove the husk and silk from two to three ears of corn. Cut kernels off of the cob until you have about two cups of corn kernels, then add to the potatoes.
  • Add dressing. Toss the potatoes and corn with 2/3 cup of Don Pancho Cilantro Lime Crema until coated.
  • Garnish, if desired. This Costco potato salad is delicious with just these three ingredients, but looks party-worthy when garnished with fresh cilantro leaves and lime wedges.

This three-ingredient Costco potato salad makes enough to serve eight to 10 people. It’s easy to halve the recipe (using a single tray of potatoes, 1 cup of corn kernels, and 1/3 cup of crema) for smaller get-togethers. You can simply throw it all together at the last minute, just before serving. In the unlikely event of leftovers, stash the potato salad in the fridge for up to two days, adding more crema when ready to serve again, if needed.  

What easy Costco sides are you making over and over? Tell us in the comments below.