Keto Copycat Costco Peanut Butter Chocolate Pie

Here’s a low-carb version of the wildly popular 5-pound Costco Peanut butter pie!  It features a honey graham crust, peanut butter pie filling, and a velvety chocolate mousse topping. This pie is a must-try!

TikTok is fueling the trend for this massively sought after, 5-pound Costco Peanut Butter Chocolate pie!  Costco stores have struggled to keep it in stock. The pie consists of three layers. The first is a graham cracker crust, followed by a peanut butter pie filling, and finally, a layer of mousse. A piped layer of the peanut butter filling gives it a decorative touch.

As someone who loves creating low-carb versions of my favorite recipes, my wheels immediately started turning when I saw Costco’s peanut butter chocolate pie. I happened to already have low-carb versions of all three pie layers! I’m a huge fan of anything with chocolate and peanut butter, and I couldn’t pass up the opportunity to make a Keto Copycat Costco Peanut Butter Chocolate Pie for all of you. Those following a low-carb lifestyle like to try the trends too!

Why you’ll love this recipe

Here are some reasons why you’ll love this low carb peanut butter chocolate pie:

• It’s low-carb and keto-friendly – This is easily achieved by substituting the crust and sweeteners with low-carb alternatives and sugar-free chocolate chips.
• Easy to make: The recipe has several straightforward steps and uses easily accessible ingredients. A lot of them are keto pantry staples.
• It’s perfect for any occasion: Whether celebrating a special occasion or just looking for a sweet treat, this pie is a great choice everyone will love.
• It’s rich and decadent: With a keto honey graham crust, peanut butter pie filling, and a chocolate mousse topping; this pie is a heavenly combination of flavors and textures that will satisfy your craving for chocolate peanut butter desserts.
• It’s customizable: You can tweak this recipe to suit your preferences by adding more or less sweetener, adjusting the amount of peanut butter filling, or swapping the chocolate mousse for a different topping. It’s very rich, so I don’t think you’ll want to add more sweetener!

Ingredients & Substitutions

You need a 9 or 10-inch deep dish pie plate to prepare this Keto Copycat Costco Peanut Butter Chocolate Pie. While it’s not required, I highly suggest using a piping bag and star tip to add a beautiful finishing touch.

The first layer is a graham cracker crust. The recipe for my crust is here: Keto Honey Graham Pie Crust

Peanut butter pie filling:

• Cream cheese
• Peanut butter
• Sweetener
• Heavy cream
• Vanilla extract

Chocolate Mousse:

• Chocolate chips – Use whatever sugar-free chocolate chips you like. I opted for semi-sweet.
• Heavy Cream and Vanilla are the ingredients for making homemade whipped cream.

How to make peanut butter chocolate pie

Although this pie requires multiple steps, the result is definitely worth the extra effort!

Make the honey graham crust and allow it cool.

Make the peanut butter pie filling:

Step 1

Use a stand mixer to beat the cream cheese and sweetener until fluffy. Mix in the peanut butter until smooth.

Step 2

Use a mixer to beat the cream and vanilla until stiff peaks form. Fold the whipped cream into the peanut butter mixture until combined.

Step 3

Save 1 cup of the peanut butter filling for the top of the pie. Spread the rest of the filling into the prepared pie crust. Refrigerate this layer for one hour.

Make the chocolate mousse layer:

Step 1

In a medium-sized bowl, place the chocolate chips. Bring the cream to a simmer in a small saucepan on low heat. Pour it over the chocolate chips and let it sit for a few minutes until the chocolate melts. Whisk the mixture until it becomes smooth, then let it cool completely.

Step 2

To prepare the whipped cream, pour the cream and vanilla into a medium mixing bowl. Use a mixer on medium speed to whip the mixture until stiff peaks form. Once done, transfer the whipped cream into the refrigerator to chill while waiting for the chocolate to cool.

Step 3

Use a silicone spatula to mix whipped cream and melted chocolate. Fold it gently until fully incorporated. Avoid overmixing.

Assemble the pie:

Step 1

Spread the mousse layer evenly across the peanut butter layer.

Step 2

Using a piping bag fitted with a star tip, transfer the leftover peanut butter filling and pipe it around the border of the pie.

Step 3

To set the filling, refrigerate uncovered. For best results, cover the pie and refrigerate it for at least 4 hours before serving. Chilling it overnight is even better!

Storage instructions

Keto Copycat Costco Peanut Butter Chocolate Pie can be wrapped tightly and stored in the refrigerator for up to 5 days. After that, it can be stored in an airtight container in the freezer for up to two months. To thaw allow it to thaw in the refrigerator overnight.

Variations and toppings

Crustless – You could easily make a delicious crustless dessert version of this pie and save quite a few carbs! Just place the peanut butter filling and chocolate mousse layers in a dessert dish. Still follow the chilling instructions for each layer.

Nut Butter – While this recipe calls for peanut butter, you can substitute it with other nut kinds like almond, cashew, or even sunflower seed butter to switch up the flavor profile.

Whipped Cream – Top the pie slices with a dollop of homemade or sugar-free whipped topping for added creaminess.

Crushed Nuts – Sprinkle crushed nuts such as peanuts, almonds, or pecans over the top of the pie for some added crunch and nutty flavor.

Fresh Berries – Top the pie with fresh berries like strawberries, raspberries, or blueberries. This will add a pop of color to the rich and creamy pie.

Peanut butter cups – Add chopped sugar-free peanut butter cups or another candy bar for even more peanut butter chocolate flavor.

Frequently asked questions

More great low carb recipes:

• Keto Oreo Dirt Cake
• Flourless Peanut Butter Chocolate Chip Cookie Bars
• The BEST Keto Cheesecake

If you love down-home southern cooking, Check out my Southern Keto cookbooks! I’ve written 3 cookbooks, and each book has over 100 recipes in it. As always, they use easy-to-find ingredients.