How many carbs are in keto peanut butter cups?

Each cup has 2.1g net carbs (5.1g total carbs minus 3g fiber), 185 calories, 4.5g protein, and 17g fat. This recipe makes 12 cups, so the whole batch stays comfortably keto at just over 2g net carbs per serving.

Can I make these without a peanut butter that has added oils?

Yes, and you should. A natural peanut butter made only from peanuts and salt keeps the filling firm and the carb count accurate. Stir it well before measuring, since natural peanut butter separates.

What sweetener works best for keto peanut butter cups?

Powdered erythritol or monk fruit blends dissolve smoothly into the filling without grit. Avoid granulated versions, which can leave a sandy texture, and skip maltitol, which raises blood sugar and adds carbs.

Keto Peanut Butter Cups: 2.1g Net Carbs

Name: Keto Peanut Butter Cups
Prep time: 15 min
Total time: 15 min
Yield: 12 servings
Cuisine: Keto
Ingredients: 1 cup (170g) sugar-free dark chocolate chips (such as Lily's); 2 tablespoons coconut oil, divided; 1/2 cup (128g) natural unsweetened peanut butter (just peanuts + salt); 2 tablespoons (28g) salted butter, softened; 2 tablespoons powdered erythritol or monk fruit sweetener; 2 tablespoons (14g) almond flour; 1 teaspoon vanilla extract; 1/4 teaspoon flaky sea salt, for topping

Keto Peanut Butter Cups

Rich, chocolate-shelled peanut butter cups with a creamy salted center and just 2.1g net carbs each. No added sugar, no melting mess, ready in about 40 minutes total including chill time. The keto candy fix that tastes exactly like the real thing, minus the crash.

Jordan Lee

Head of Nutrition · June 18, 2026

15 min

Prep

—

Cook

15 min

Ready in

Servings

Easy

Difficulty

Nutrition per serving

2.1g

Net carbs

Fiber

5.1g

Total carbs

4.5g

Protein

17g

Fats

185

Calories

Per serving · makes 12. Values are estimates; brands vary.

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These no-bake keto peanut butter cups deliver that classic chocolate-and-salted-peanut-butter bite with just 2.1g net carbs each. A quick microwave-and-chill method means no tempering, no baking, and a batch of twelve ready in well under an hour.

Ingredients

1 cup (170g) sugar-free dark chocolate chips (such as Lily's)

2 tablespoons coconut oil, divided

1/2 cup (128g) natural unsweetened peanut butter (just peanuts + salt)

2 tablespoons (28g) salted butter, softened

2 tablespoons powdered erythritol or monk fruit sweetener

2 tablespoons (14g) almond flour

1 teaspoon vanilla extract

1/4 teaspoon flaky sea salt, for topping

Instructions

Line a 12-cup mini muffin tin with paper or silicone liners.

Make the peanut butter filling: in a small bowl, stir together the peanut butter, softened butter, powdered sweetener, almond flour, and vanilla until thick and smooth. Set aside.

Melt the chocolate shell: combine the chocolate chips and 1 1/2 tablespoons coconut oil in a microwave-safe bowl. Microwave in 20-second bursts, stirring between each, until fully smooth.

Spoon about 1 teaspoon of melted chocolate into each liner and tilt to coat the bottom. Freeze for 5 minutes to set.

Roll the peanut butter mixture into 12 small balls, flatten slightly, and press one into the center of each chocolate base, leaving a small gap around the edges.

Spoon the remaining chocolate over each cup to cover the filling completely, tapping the tin to settle. Sprinkle with flaky sea salt.

Freeze for 15 minutes until firm. Store in the refrigerator and enjoy chilled.

Tips & notes

Use a peanut butter with no added sugar or palm oil — the only ingredients should be peanuts and salt — to keep carbs low and the filling firm.

Store cups in an airtight container in the fridge for up to 2 weeks, or freeze for up to 3 months. They soften quickly at room temperature, so serve straight from cold.

Swap peanut butter for unsweetened almond butter for a slightly lower-carb, peanut-free version with the same method.

Log this recipe in one tap

Save keto peanut butter cups to CarbMeNot and track its 2.1g net carbs against your daily budget automatically.

Frequently asked questions

How many carbs are in keto peanut butter cups?: Each cup has 2.1g net carbs (5.1g total carbs minus 3g fiber), 185 calories, 4.5g protein, and 17g fat. This recipe makes 12 cups, so the whole batch stays comfortably keto at just over 2g net carbs per serving.
Can I make these without a peanut butter that has added oils?: Yes, and you should. A natural peanut butter made only from peanuts and salt keeps the filling firm and the carb count accurate. Stir it well before measuring, since natural peanut butter separates.
What sweetener works best for keto peanut butter cups?: Powdered erythritol or monk fruit blends dissolve smoothly into the filling without grit. Avoid granulated versions, which can leave a sandy texture, and skip maltitol, which raises blood sugar and adds carbs.