Costco Grain and Celery Salad Recipe Copycat: Nutty Crunch With Zesty Lemon Dressing

This copycat version recreates Costco’s popular grain and celery salad with impressive accuracy. The dish balances nutty whole grains with crisp celery, all tied together with a bright lemon dressing that keeps it fresh and vibrant.

I’ve tested multiple grain combinations to match the original’s texture and flavor. The dressing uses simple ingredients but delivers a zesty, tangy finish that complements the salad’s earthy base without overpowering it.

What sets this apart is the attention to detail—from toasting the grains for extra depth to slicing the celery thinly for the perfect crunch. It’s a satisfying dish that works as a side or light meal.

Serve chilled for the best experience, allowing the flavors to meld together. This recipe stays true to the original while making it easy to prepare at home.

Ingredients for Costco Grain and Celery Salad Recipe Copycat

Nutty grains, crisp celery, and a bright lemon dressing come together in this spot-on copycat.

The grain blend is key here. Costco’s version uses farro and wheat berries—look for pre-mixed bags in the bulk section or near the rice at Whole Foods. I tested multiple ratios and found the nutty depth comes from toasting the grains first. Don’t skip this step (worth the extra 5 minutes). The celery should be organic if possible—thinner stalks mean less stringiness.

Need to swap grains? Barley or freekeh work well, but avoid instant rice—it turns mushy. No honey? Agave or maple syrup at the same amount. For a sharper bite, add 1 tsp lemon zest. The Parmesan can be swapped for Pecorino Romano if you love that salty kick. Baby celery (celeriac) isn’t a good substitute—it’s a different texture entirely.

This salad actually improves after 24 hours in the fridge as the grains soak up the dressing. Keeps for 4-5 days in an airtight container. Toast the almonds fresh if you can—Trader Joe’s sells pre-toasted, but they lose crunch fast. Add them just before serving.

Step-by-Step Instructions for Costco Grain and Celery Salad

This method delivers the signature nutty crunch and bright lemon flavor of the original.

Step 1: Cook the Whole Grain Blend

Rinse the 2 cups Whole Grain Blend under cold water to remove any debris. In a medium saucepan, combine the grains with 4 cups of water and bring to a boil over high heat. Once boiling, reduce to a simmer, cover, and cook for 25-30 minutes until the grains are tender but still have a slight bite.

Drain any excess water and spread the grains on a baking sheet to cool completely. This prevents the grains from becoming mushy when mixed with the dressing later. The grains should be at room temperature before assembling the salad.

Step 2: Prepare the Vegetables and Herbs

Thinly slice the 6 whole Celery Stalks into ¼-inch pieces for maximum crunch. Finely dice the 0.5 whole Red Onion to add a sharp bite that balances the salad’s richness. Chop the 0.5 cup Fresh Parsley finely, discarding any thick stems for a consistent texture.

Combine the celery, red onion, and parsley in a large bowl. The parsley should be vibrant green and fragrant, adding freshness to each bite. This step ensures all the raw components are ready to absorb the dressing evenly.

Step 3: Whisk Together the Lemon Dressing

In a small bowl, whisk together the 0.5 cup Extra-Virgin Olive Oil, ⅓ cup Lemon Juice, 2 tbsp Dijon Mustard, 2 tbsp Honey, 1 tsp Salt, and 0.5 tsp Black Pepper. Whisk vigorously for 30-45 seconds until the dressing is fully emulsified and slightly thickened.

The mustard acts as a natural emulsifier, ensuring the oil and lemon juice stay combined. Taste the dressing and adjust the seasoning if needed—it should be tangy with a hint of sweetness from the honey.

Step 4: Assemble the Salad

Add the cooled Whole Grain Blend to the bowl with the celery, red onion, and parsley. Pour the dressing over the grains and vegetables, and toss gently to coat everything evenly. The grains should glisten lightly with dressing but not be soggy.

Fold in the 0.5 cup Parmesan Cheese and 0.5 cup Toasted Almonds, reserving a small handful of each for garnish. The Parmesan adds a salty depth, while the almonds provide the signature nutty crunch.

Step 5: Chill and Serve

Cover the bowl and refrigerate the salad for at least 30 minutes to allow the flavors to meld. This resting time lets the grains absorb the dressing and soften slightly, creating a harmonious texture.

Before serving, give the salad one final toss and garnish with the reserved Parmesan and almonds. The salad should have a balance of textures: the chew of the grains, the crunch of the celery and almonds, and the creamy tang of the dressing.

Make-Ahead Tips for This Dish

Prep Ahead Strategy

Cook and cool the 2 cups Whole Grain Blend up to 2 days in advance. Store in an airtight container at 40°F until ready to assemble. This saves 30 minutes on the day of serving. 💡

Dressing Make-Ahead

Whisk the dressing components together and refrigerate for up to 3 days. The flavors intensify over time. Let it sit at room temperature for 15 minutes before mixing with the grains.

Veggie Prep Timing

Slice the 6 whole Celery Stalks and dice the 0.5 whole Red Onion the night before. Store in a bowl of ice water to maintain crispness, then drain before assembling.

Almond Toasting

Toast the 0.5 cup Toasted Almonds fresh on serving day for maximum crunch. Spread on a baking sheet at 350°F for 5-7 minutes, watching closely to avoid burning.

Final Assembly

Combine grains, veggies, and dressing up to 12 hours before serving. Add the 0.5 cup Parmesan Cheese and almonds just before serving to preserve texture. 🔥

Storage Tip

This salad keeps well for 4-5 days in the fridge. Store in a shallow, airtight container to prevent sogginess. Stir before serving to redistribute flavors.

Frequently Asked Questions