Copycat Costco Quinoa Salad Recipe: Fresh Ingredients and Zesty Dressing

This quinoa salad captures the fresh, vibrant flavors of the beloved Costco version with a homemade touch. I developed this recipe after countless attempts to replicate that perfect balance of textures and tastes.

The secret lies in cooking the quinoa just right and combining it with crisp vegetables, creamy avocado, and a zesty dressing that ties everything together. Each bite delivers a satisfying mix of crunch, creaminess, and bright citrus notes.

What you get is a salad that’s as nutritious as it is delicious—packed with protein, fiber, and fresh ingredients. It’s the kind of dish that feels like a treat but fuels your day with wholesome goodness.

Perfect for meal prep, picnics, or a light lunch, this salad stays fresh for days when stored properly. Here’s how to make it at home.

Ingredients for Copycat Costco Quinoa Salad

Recreate that iconic deli counter taste with fresh vegetables, creamy avocado, and bright citrus dressing.

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The quinoa forms the foundation, so rinse it well to remove bitterness—look for pre-washed at Whole Foods or Trader Joe’s to save time. Avocados should be ripe but firm (give slightly when pressed). For the feta, vegetarian rennet versions are widely available at Costco or most supermarkets. The cilantro makes a difference—opt for bunches with vibrant green leaves, not wilted or yellowing.

No red onion? Shallots or green onions work in a pinch. Skip the cilantro if you’re one of those people who tastes soap (no judgment). For a vegan version, omitted feta or use vegan feta. The honey can be swapped with agave or maple syrup. Short on lemon juice? Lime juice at a 1:1 ratio brings similar brightness. The Dijon mustard adds depth—yellow mustard lacks the complexity.

This salad holds up well—store in an airtight container for 4-5 days in the fridge. Keep the avocado separate until serving to prevent browning. The dressing can be made 2 days ahead. Quinoa freezes beautifully for 3 months if you want to prep in bulk.

Step-by-Step Instructions for Costco Quinoa Salad

Master the technique behind this popular dish with precise steps and professional attention to detail.

Step 1: Cook and Cool the Quinoa

Rinse the 1.5 cups Quinoa thoroughly under cold water to remove any bitterness. Combine it with the 3 cups Water in a medium saucepan and bring to a boil over high heat. Once boiling, reduce to a simmer, cover, and cook for 15 minutes until the water is absorbed and the quinoa is fluffy.

Remove from heat and let it sit covered for 5 minutes. Spread the quinoa on a baking sheet to cool completely—this prevents it from turning mushy when mixed with the other ingredients. The quinoa should be at room temperature before proceeding.

Step 2: Prepare the Vegetables and Herbs

While the quinoa cools, dice the 1 whole English Cucumber, 1 whole Red Bell Pepper, and 0.5 whole Red Onion into uniform, small pieces. Halve the 1 cup Cherry Tomatoes and remove the seeds to prevent excess moisture in the salad.

Chop the 0.5 cup Fresh Cilantro, removing the stems for a cleaner presentation. Consistency in cutting ensures every bite delivers balanced flavor and texture. Keep the diced vegetables separate until ready to combine.

Step 3: Whisk Together the Dressing

In a small bowl, combine the 0.5 cup Extra-Virgin Olive Oil, 0.25 cup Lemon Juice, 2 tbsp Red Wine Vinegar, 2 tbsp Honey, 1 tbsp Dijon Mustard, 1 tsp Salt, and 0.5 tsp Black Pepper. Whisk vigorously until the dressing is fully emulsified and smooth.

Taste and adjust the seasoning if needed, though the measurements provided should yield a perfectly balanced dressing. The acidity from the lemon and vinegar will brighten the flavors of the salad.

Step 4: Assemble the Salad

In a large mixing bowl, combine the cooled quinoa, diced vegetables, and chopped cilantro. Pour the dressing over the mixture and toss gently to coat everything evenly. Be careful not to overmix, as this can break down the vegetables.

Fold in the 0.75 cup Feta Cheese, ensuring it’s evenly distributed without clumping. The feta adds a creamy, tangy contrast to the fresh vegetables.

Step 5: Add Avocados and Serve

Just before serving, dice the 2 whole Avocados and fold them into the salad. Adding them last maintains their vibrant green color and prevents browning. The avocados should be ripe but firm enough to hold their shape.

Serve immediately, or refrigerate for up to 2 hours to allow the flavors to meld. This dish is best enjoyed fresh but can be stored in the refrigerator for up to 2 days, though the avocados may darken slightly over time.

Dietary Considerations for copycat costco quinoa salad

Gluten-Free Friendly

This dish is naturally gluten-free, as quinoa serves as the base instead of wheat-based grains. Just ensure all ingredients, especially the Dijon mustard and feta cheese, are certified gluten-free if you have celiac disease or severe sensitivity.

Vegetarian and Vegan

The recipe is vegetarian as written, thanks to plant-based quinoa and fresh vegetables. For a vegan version, simply omit the 0.75 cup feta cheese or swap in a vegan feta alternative. Replace the 2 tbsp honey with agave or maple syrup to keep it fully plant-based. 🌱

Nut-Free and Safe

This salad contains no nuts or nut-derived ingredients, making it safe for those with nut allergies. However, always check the labels on pre-packaged items like feta cheese for potential cross-contamination warnings if allergies are severe.

Low-Calorie Adjustments

To reduce calories, cut the 0.5 cup olive oil in the dressing by half and add 2-3 tbsp water to maintain volume. You can also reduce the 0.75 cup feta cheese to ½ cup for a lighter version without sacrificing flavor.

Dairy-Free Option

Skip the feta cheese entirely or use a dairy-free alternative. Brands like Violife or Follow Your Heart offer great plant-based feta options. The salad remains delicious and creamy with avocado providing richness. ✨

Sodium Considerations

To lower sodium, reduce the 1 tsp salt in the dressing by half. Opt for low-sodium feta cheese or rinse regular feta under cold water to remove excess brine. The fresh vegetables and herbs keep the dish flavorful even with less salt.

Frequently Asked Questions