The Best Costco Basil Butter Recipe

Copycat Costco Basil Butter is a unique take on the classic compound butter. What makes it different is the addition of fresh basil, which gives it an herby flavor. The combination of creamy butter and aromatic basil creates a versatile condiment that can enhance a many of your favorite dishes. 

This basil butter is made with only six ingredients. It adds a fresh and herby flavor to any dish, making it perfect for a quick and easy dinner. Whether used as a finishing touch on grilled meats, mixed into pasta, or spread on crusty bread, Costco Basil Butter adds a burst of freshness to every bite.

Be sure to try your herby butter with these easy recipes:
Costco Chicken Skewers
Popeyes Blackened Chicken
Texas Roadhouse Herb Crusted Chicken

Ingredients for this copycat Costco Basil Butter recipe

Scroll down to the recipe card at the bottom of the page for the detailed ingredient measurements.

• Butter: is the base ingredient of this recipe. I recommend using unsalted butter, as using salted butter may make this recipe too salty. 
• Fresh Basil: is the key ingredient that gives your copycat Costco's Basil Butter its distinctive flavor of fresh basil. I recommend using fresh basil for this recipe. 
• Garlic Cloves: adds a savory flavor to the butter, pairing well with the basil. 
• Parmesan Cheese: should be finely grated and mixed into the butter for an extra layer of richness.
• Pine Nuts or Walnuts: add for a delightful crunch and nutty flavor.
• Salt: is to taste. Start with a small amount and adjust accordingly, tasting as you go to achieve the desired seasoning.

How to Make this Costco Basil Butter Recipe

Make sure to scroll down to the end of this post for the full step-by-step instructions.

1. In a food processor, blend the basil leaves, garlic, parmesan cheese, nuts, and salt. Once mixed well, add in the softened butter and mix again to combine. 
2. Use as a spread, a dip, pasta sauce, or chill in the fridge and scoop dollops on top of your salmon or chicken before baking!

Frequently Asked Questions - FAQ

Can I use dried basil instead of fresh for this Costco Basil Butter recipe?

If you can't find fresh basil, you can use dried basil instead. The flavor will be slightly different, so start using a small amount and add more as you taste it.

You want to balance the flavor with the butter without making it too strong. Fresh basil has a stronger aroma and flavor, but dried basil will do in a pinch. 

What can I pair with Costco Basil Butter?

Costco Basil Butter adds a ton of flavor to many different dishes. Whether it's enhancing the taste of roasted vegetables or adding to the richness of a pasta dish, it pairs greatly with many different dishes.

From chicken and salmon filets to rice and steak, this versatile condiment elevates every bite, making meals absolutely delicious. 

Can I make this copycat recipe vegan?

Absolutely! You can easily make Costco Basil Butter vegan by substituting plant-based butter for traditional dairy butter. Make sure the dairy-free butter is at room temperature so that it's easier to blend with the fresh basil and other ingredients. 

Can I use salted butter instead of unsalted butter?

Yes, you can use salted butter instead of unsalted butter in the recipe. However, keep in mind that salted butter may make the dish a bit saltier, so you will need to adjust the quantity of additional salt. I recommend tasting the butter as you go so it doesn't get too salty.

Can I customize this Costco Basil Butter recipe?

Definitely! You can add ingredients like other fresh herbs, minced garlic, a pinch of red pepper flakes, or even a hint of lemon zest. The best thing about making this at home is that you can add your favorites and experiment with new flavors.

What do I do with leftover Costco Basil Butter?

Costco Basil Butter can be stored in an airtight container. It will keep in the refrigerator for up to two weeks. You can also make a large amount of this recipe in advance, just place your leftovers in the freezer. Once ready, just allow it to come back to room temp before using! I used it with this grilled bourbon salmon and it was perfect!

Can I freeze Costco Basil Butter?

If you want to keep your Costco Basil Butter fresh for longer, you can freeze it.

First, shape the butter into a log or divide it into smaller portions. Then, wrap it tightly using plastic wrap or aluminum foil or place it into an airtight container. This will help you thaw the desired amount easily and quickly when you're ready to use it. Remove your butter from the freezer and thaw in the refrigerator overnight when you're ready to use. 

The basil flavor may intensify slightly upon freezing, but the overall quality and taste should remain excellent.

The Best Costco Basil Butter Recipe