Published: Aug 2, 2021 by Carolyn

Keto Peanut Butter Cups

This post may contain Amazon or other affiliate links. As an Amazon Associate I earn from qualifying purchases.

These keto peanut butter cups feature a sugar free chocolate shell and a rich, creamy peanut butter center. They’re delicious and easy, so whip up a batch today!

Eat them plain or use them as garnish on keto peanut butter pie. Sweet and delicious.

Titled image of a stack of keto peanut butter cups, and the top one has a bite taken out of it.

Peanut butter is my Achilles heel. It’s my weakness, my downfall, my greatest temptation. And peanut butter cups have long been one of my favorite candies.

Thank heavens for these keto peanut butter cups so I can indulge without risk. I’ve been making these sugar free treats for about as long as I’ve been low carb. And they’ve saved me many a time when I needed a sweet bite to keep me on track.

My kids love them too and since they’re so easy to make. Along with my keto peanut butter fudge, we have them around almost constantly.

A stack of peanut butter cups sits in front of a bowl of peanuts.

Why make your own keto peanut butter cups?

I created this recipe back in 2012 because I had no other option. At that time, you couldn’t buy good quality sugar free peanut butter cups like Lily’s or ChocZero. And I do believe I may have been the first person to make them.

But now that there are several good storebought options, why bother making your own? I have two reasons for you: cost and availability.

The pre-packaged cups cost about $1 per cup. My recipe makes 16 to 18 cups and comes out to less than 60 cents per cup!

Additionally, not everyone has access to Lily’s or ChocZero, whereas almost all of us can get our hands on some sugar free chocolate, peanut butter, and a little sweetener.

And I am one of those weirdos who takes pleasure in making things from scratch. If you are too, then I highly recommend having some fun with this.

A collage of photos showing the steps for making keto peanut butter cups.

How to make keto peanut butter cups

You will need:

Candy molds – I recommend these ones because they are the exact same size as the storebought keto peanut butter cups.
Sugar free chocolate
Cocoa butter or coconut oil
Peanut butter
Butter
Powdered or liquid sweetener
Vanilla extract

Method

Melt the chocolate. As always, I recommend doing this double boiler style to avoid seizing. Adding a little cocoa butter or coconut oil also helps thin the chocolate coating.
Coat the candy molds. You want to use a little over half the chocolate to coat the bottom and sides of each cup.
Freeze the molds. You want that first later of chocolate to firm up properly.
Make the peanut butter filling. Simply melt some peanut butter and butter together, stir in some sweetener, and fill each cup almost to the top.
Freeze the molds again to firm up the filling.
Top with the remaining chocolate. Then freeze or refrigerate until firm.

Keto peanut butter cups on a white table with peanuts scattered around.

Frequently Asked Questions

I don’t eat peanuts, can I make these with almond butter?

You bet! Any nut or seed butter will work here, including my Homemade Keto Nutella.

Can I use a different sweetener?

The filling for these keto peanut butter cups can be made with any sweetener, but it’s important to use powdered or liquid sweeteners to avoid grittiness.

How do I make them dairy free?

That’s an easy switch. Be sure to use keto dark chocolate and swap the butter for coconut oil or palm shortening.

Can I use sugar free milk chocolate or white chocolate?

Yes but I want to caution you that the white chocolate doesn’t always melt that well and can seize very easily. Watch it carefully and stir constantly.

I don’t have candy molds, can I use silicone muffin cups?

Yes you can. If you are using standard muffin cups, they will be larger and you will likely get only 12 cups. Only coat the sides with chocolate about ¼ of the way up.

Can I use parchment paper liners?

You can do that too but I recommend placing them into a muffin tin so that they hold their shape.

I don’t have access to sugar free chocolate, what do I do?

I have a solution for that! I used to make these keto peanut butter cups with a chocolate shell made from scratch. I have provided those directions in the recipe notes.

Close up shot of a stack of keto peanut butter cups, and the front one has a bite taken out of it.

Storage instructions

I recommend storing these keto peanut butter cups in the fridge in a covered container, but letting them come to room temperature before serving.

Have some fun baking with keto peanut butter cups

Obviously, you can just eat them as is, but it’s fun to add them to other keto recipes too. Why not try:

A stack of keto peanut butter cups with a bite taken out of the top one.

Keto Peanut Butter Cups Recipe

These keto peanut butter cups feature a sugar free chocolate shell and a rich, creamy peanut butter center. They're easy to make so whip up a batch today!

4.91 from 31 votes

Print Pin Rate

Course: Dessert

Cuisine: American

Keyword: keto peanut butter cups

Prep Time: 20

Cook Time: 10

Cooling Time: 30

Total Time: 1

Servings: cups

Calories: 112kcal

Ingredients

Chocolate Coating:

6 ounces sugar free dark chocolate chopped
½ ounce cocoa butter (or 2 teaspoon coconut oil)

Peanut Butter Filling:

½ cup peanut butter
2 tablespoon butter
¼ cup powdered Swerve Sweetener
½ teaspoon vanilla extract

US Customary – Metric

Instructions

In a heatproof bowl set over barely simmering water, melt the chocolate and cocoa butter together, stirring until smooth.
Use the back of a small spoon to spread a little over half of the chocolate mixture on the bottom and up the sides of the candy molds. Freeze 10 minutes.
In a microwave safe bowl, melt the peanut butter and butter together on high in 30 second increments, stirring until smoth. Whisk in the powdered sweetener and vanilla extract.
Remove the chocolate cups from freezer and fill almost to the top with the peanut butter mixture, leaving enough space to cover with remaining chocolate. Return to freezer for another 10 minutes or so.
Rewarm the remaining chocolate gently over low heat and stir until smooth. Spread over the peanut butter filling to the sides of each cup. Chill until set, 20 minutes.

Notes

If you do not have sugar-free chocolate available to you, you can make your own. It’s not quite as good but it works!

Chocolate Coating:

¼ cup butter
3 oz unsweetened chocolate
¼ cup powdered Swerve
2 tablespoon cocoa powder
½ teaspoon vanilla extract
In a small saucepan over low heat, melt the butter, unsweetened chocolate and sweetener together, stirring until smooth. Stir in the cocoa powder and vanilla.Let cool 5 to 10 minutes, until somewhat thickened, the proceed as directed.

Nutrition Facts

Keto Peanut Butter Cups Recipe

Amount Per Serving (1 cup)

Calories 112 Calories from Fat 90

% Daily Value*

Fat 10g15%

Carbohydrates 6.1g2%

Fiber 2.5g10%

Protein 2.3g5%

* Percent Daily Values are based on a 2000 calorie diet.

Please note that I am not a medical or nutritional professional. I am simply recounting and sharing my own experiences on this blog. Nothing I express here should be taken as medical advice and you should consult with your doctor before starting any diet or exercise program. I provide nutritional information for my recipes simply as a courtesy to my readers. It is calculated using MacGourmet software and I remove erythritol from the final carb count and net carb count, as it does not affect my own blood glucose levels. I do my best to be as accurate as possible but you should independently calculate nutritional information on your own before relying on them. I expressly disclaim any and all liability of any kind with respect to any act or omission wholly or in part in reliance on anything contained in this website.

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.

Keto Peanut Butter Cups

Why make your own keto peanut butter cups?