I just finished making this incredible Costco Basil Pesto Butter Recipe, and my kitchen smells amazing! After seeing it at Costco and hearing everyone rave about it, I knew I had to try making my own version at home.

I’m so glad I did. It’s rich, herby, and has the perfect savory kick from the garlic and parmesan. It was surprisingly simple to whip up, and now I have this gorgeous, flavorful butter ready to elevate everything from a simple piece of toast to a perfectly cooked salmon filet.

Ingredients

Here are the ingredients you’ll need to create this delicious compound butter.

1 cup unsalted butter, softened: Using softened, room-temperature butter is key to getting a smooth, whipped consistency. Unsalted allows you to control the final saltiness of the butter.
2 cups fresh basil leaves: This is the heart of the pesto flavor. Make sure your basil is fresh and vibrant for the best taste. Basil paste can work in a pinch, but fresh is superior.
1 tablespoon minced garlic: Freshly minced garlic provides the best flavor, but jarred minced garlic is a convenient alternative that also works well.
¾ cup grated parmesan cheese: For the best results, grate your own parmesan from a block. It melts more smoothly and has a much better flavor than pre-shredded cheese.
¼ cup pine nuts: These add a classic, slightly sweet, and nutty flavor to the pesto. Toasting them lightly beforehand can deepen their flavor.
¼ teaspoon salt: A little salt helps to bring out all the other flavors.
¼ teaspoon black pepper: Freshly ground black pepper will give you the most robust taste.

Note: This recipe yields about 1.5 cups of pesto butter, enough for several servings.

Variations

Feel free to get creative and customize this pesto butter to your liking.

Nut-Free Option: If you have a nut allergy or can’t find pine nuts, you can swap them for sunflower seeds or simply leave them out. The texture will be slightly different, but still delicious.
Spicy Kick: Add ¼ teaspoon of red pepper flakes into the food processor with the other ingredients for a little bit of heat.
Lemony Freshness: A teaspoon of fresh lemon zest can add a bright, zesty note that complements the basil beautifully.
Different Herbs: While basil is classic, you can experiment with other herbs. Try a mix of parsley and basil, or even add some fresh cilantro for a different twist.
Dairy-Free: For a dairy-free version, use a high-quality vegan butter and a dairy-free parmesan cheese alternative.

Costco Basil Pesto Butter Recipe — Credit: Pinterest

Cooking Time

This flavor-packed butter comes together in a flash.

Prep Time: 5 minutes
Cooking Time: 0 minutes
Total Time: 5 minutes

Equipment You Need

You only need one main piece of equipment for this easy recipe.

Food Processor: A food processor or a high-powered blender is essential for pulsing the pesto ingredients into a fine mixture and whipping them into the butter.
Spatula: Useful for scraping down the sides of the food processor to ensure everything is evenly mixed.
Airtight Container: You’ll need this for storing your finished basil pesto butter in the fridge or freezer.

How to Make Costco Basil Pesto Butter Recipe?

Making this compound butter is a simple process that requires no cooking at all. The key is to blend the pesto ingredients first to create a flavorful base, and then incorporate the softened butter until everything is perfectly combined. It’s a quick and effortless way to create a gourmet butter that’s packed with fresh flavor.

Prepare the Pesto Base

First, add the fresh basil leaves, minced garlic, grated parmesan cheese, pine nuts, salt, and black pepper to the bowl of a food processor. Pulse the ingredients several times until they are finely chopped and well combined, forming a thick, fragrant paste. You may need to scrape down the sides of the bowl once or twice to ensure everything is incorporated evenly.

Add the Butter

Next, add the softened unsalted butter to the food processor with the pesto mixture. Make sure your butter is truly at room temperature, as this will help it blend seamlessly. Pulse again until the butter and pesto are completely blended. The final result should be a smooth, creamy, and beautifully green-speckled butter.

Chill and Store

Once blended, transfer the basil pesto butter from the food processor into an airtight container. You can use it immediately, but the flavors will meld and become even more pronounced if you refrigerate it for at least an hour before serving. This also allows the butter to firm up, making it easy to slice or scoop.

Additional Tips for Making this Recipe Better

After making a batch of this butter, I’ve discovered a few things that can make it even more spectacular.

I highly recommend toasting the pine nuts before adding them to the food processor. I just put them in a dry skillet over medium heat for a few minutes until they were fragrant and lightly golden. This really deepens their nutty flavor and adds another layer of complexity.
Don’t be afraid to taste and adjust the seasoning. After I blended everything, I took a small taste and decided it needed a little more salt and another squeeze of lemon juice to really make the flavors pop.
If you have extra fresh basil, I learned a great trick to keep it fresh longer. Just place the stems in a glass of water, like a bouquet of flowers, and leave it on the counter. It makes a huge difference.

How to Serve Costco Basil Pesto Butter?

This basil pesto butter is incredibly versatile. One of the best ways to use it is to replicate the famous Costco meal by slathering a generous amount over salmon filets before baking or grilling. It’s also fantastic melted over hot pasta for a quick and easy sauce, or spread on a warm, crusty baguette.

Try adding a dollop to grilled chicken, steak, or roasted vegetables to instantly elevate your meal. For a beautiful presentation, you can roll the butter into a log using parchment paper, chill it, and then slice it into perfect rounds to place on top of your dishes.

Nutritional Information

Here is an approximate nutritional breakdown for a one-tablespoon serving.

Calories: 183kcal
Protein: 3g
Carbohydrates: 2g
Fat: 19g

Make Ahead and Storage

This recipe is perfect for preparing in advance.

You can store the basil pesto butter in an airtight container in the refrigerator for up to 10 days. The flavors will continue to develop, making it even more delicious over time.

For longer storage, this butter freezes beautifully. Roll it into a log using parchment or plastic wrap and place it in a freezer-safe bag. It will keep well in the freezer for up to 3 months.

You can use the butter directly from the refrigerator. If using from frozen, you can either thaw it in the refrigerator overnight or slice off what you need and let it soften at room temperature for a few minutes.

Why You’ll Love This Recipe?

There are so many reasons to fall in love with this homemade pesto butter.

Quick and Effortless: This recipe takes only 5 minutes and a food processor to make. It’s a simple way to create something that tastes gourmet without any complex steps.
Packed with Flavor: The combination of fresh basil, garlic, and parmesan cheese creates a vibrant and savory flavor that can enhance almost any dish.
Incredibly Versatile: Use it on salmon, chicken, pasta, bread, or vegetables. It’s a multi-purpose flavor booster that you’ll find endless uses for in your kitchen.
Better Than Store-Bought: Making it at home means you control the quality of the ingredients. The result is a fresher, more flavorful butter without any preservatives.
Perfect for Meal Prep: Whip up a batch on the weekend and have it ready to go for quick and flavorful meals all week long. It also freezes perfectly for long-term use.