Keto Reese’s Peanut Butter Cupcakes Recipe

Updated May 2026

These Keto Reese’s Peanut Butter Cupcakes are a rich low-carb chocolate treat with a sugar-free peanut butter cup hidden inside and a creamy chocolate peanut butter frosting on top. They are sweet, chocolatey and properly satisfying when you want a keto dessert that feels a little bit special.

Each cupcake works out at around 7g net carbs per serving, making them more of an occasional keto treat than an everyday snack. Basically, not breakfast. Though honestly, I’m not here to judge your life choices.

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Why You’ll Love These Keto Reese’s Cupcakes

• They are rich, chocolatey and sweet without using regular sugar.
• The hidden peanut butter cup centre makes them feel more indulgent.
• They are made with almond flour and erythritol/Swerve-style sweetener.
• The chocolate peanut butter frosting makes them feel like a proper dessert.
• They are great for birthdays, weekend baking or when your sweet tooth is being an absolute menace.

Keto Reese’s Peanut Butter Cupcakes Ingredients

You only need a handful of low-carb baking ingredients to make these cupcakes. The almond flour gives the sponge structure, the Greek yoghurt helps keep the cupcakes moist, and the peanut butter frosting brings everything together beautifully.

For The Cupcakes

• 240g almond flour
• 130g erythritol or Swerve confectioners sweetener
• 1 tsp bicarbonate of soda / baking soda
• ½ tsp baking powder
• 3 large eggs
• 280g plain Greek yoghurt
• 1 tsp vanilla extract
• 8 sugar-free Reese’s peanut butter cups

For the Frosting:

• 6 tbsp softened unsalted butter
• 6 tbsp erythritol or Swerve confectioners sweetener
• 2 tbsp cocoa powder
• 2 tbsp natural keto-friendly peanut butter
• 2 tbsp double cream / heavy whipping cream
• ½ tsp vanilla extract

How To Make Keto Reese’s Peanut Butter Cupcakes

Equipment Needed

You do not need anything fancy to make these Keto Reese’s Peanut Butter Cupcakes, but having the basics ready before you start makes the whole process much easier.

Recipe Tips For The Best Keto Cupcakes

• Let the cupcakes cool before frosting. If they are still warm, the frosting can soften and slide around like it has somewhere better to be.
• Use natural peanut butter. Choose one with no added sugar where possible.
• Do not overfill the cases. Half-fill first, add the peanut butter cup, then cover with the remaining batter.
• Check your sweetener. Powdered erythritol or confectioners-style sweetener usually gives a smoother frosting.
• Keep an eye on baking time. Almond flour bakes differently from wheat flour, so check from around 15 minutes.

Storing And Freezing Keto Cupcakes

You can store these keto cupcakes in an airtight container at room temperature for up to 3 days. As they are frosted, keep them somewhere cool and out of direct sunlight.

You can also store them in the fridge to help them last a little longer, although the sponge may become slightly firmer. For the best texture, allow chilled cupcakes to sit at room temperature for a short while before eating.

To freeze, place the cupcakes uncovered in the freezer for around an hour so the frosting firms up. Then transfer them to a freezer-safe container. They can be frozen for up to 6 months and thawed overnight in the fridge or at room temperature.

If you fancy something a little lighter and citrusy next time, try these Keto Italian Lemon Cookies. They are soft, sweet and finished with a fresh sugar-free lemon glaze, making them a lovely low-carb dessert when you want a break from chocolate.

Printable Recipe Card

Use the recipe card below for the full ingredients, method, timings and nutrition information.

Keto Reese’s Peanut Butter Cupcakes

Indulge in a guilt-free treat with our delicious Keto Reese’s Peanut Butter Cupcakes. The perfect way to satisfy your sweet tooth while staying on track with your keto diet journey.

5 from 5 votes

Print Recipe Pin Recipe

Prep Time 15 minutes mins

Cook Time 20 minutes mins

Total Time 35 minutes mins

Course Dessert

Cuisine American

Servings 8 cupcakes

Calories 351 kcal

Equipment

• 1 Cupcake Tin
• 8 Cupcake liners
• 1 Large mixing bowl
• 1 Strong mixing spoon/ Hand whisk/ Kitchen mixer

Ingredients

 

MetricUS Customary

 

1x2x3x

For the cupcakes

• 240 g almond flour
• 130 g Erythritol Can use Swerve
• 1 tsp Bicarbonate of Soda Baking soda
• 1/2 tsp Baking powder
• 3 large eggs
• 280 g Plain Greek yoghurt
• 1 tsp Vanilla extract
• 8 Sugar Free Reese's Peanut Butter Cups

For the frosting

• 6 tbsp Salt free Butter softened
• 6 tbsp Erythritol
• 2 tbsp Cocoa
• 2 tbsp Natural, Keto friendly peanut butter
• 2 tbsp Double Cream / Heavy Whipping Cream
• 1/2 tsp Vanilla extract

Instructions

 

For the cupcakes

• Preheat your oven to 180°C/ degrees, and line 8 sections of a muffin tin with cupcake liners.
• Line 8 sections of a muffin/ cupcake tin with cupcake liners.
• Combine all cupcake ingredients with the exception of the Reese's Peanut Butter Cups and ensure the cupcake batter is smooth and creamy in texture.
• Half fill the cupcake liners with the mixture.
• Gently press a Reese's Peanut Butter Cup into the middle of each half filled cupcake case.
• Use the remaining Keto cupcake mixture to fill the cupcake cases.
• Place in the oven and bake for 15-20 minutes.
• Once baked, leave the Keto Reese's Peanut Butter Cupcakes to cool before frosting.

For the frosting

• Combine all the ingredients until you have a smooth consistency.
• Place the frosting inside a piping bag and decorate the cupcakes as desired.
• Serve and enjoy!

Nutrition

Serving: 1 CupcakesCalories: 351kcalCarbohydrates: 6gProtein: 14gFat: 30gSaturated Fat: 9gPolyunsaturated Fat: 1gMonounsaturated Fat: 4gTrans Fat: 0.4gCholesterol: 98mgSodium: 304mgPotassium: 105mgFiber: 4gSugar: 5gVitamin A: 421IUVitamin C: 0.02mgCalcium: 138mgIron: 2mg

Keyword Cupcakes, Keto, Low carb, Peanut Butter

Tried this recipe?Let us know how it was!

Frequently Asked Questions

Can you eat Reese’s on keto?

Original Reese’s peanut butter cups are not usually suitable for keto because of their sugar content. This recipe uses the sugar-free version, but it is worth checking the ingredients because sugar-free sweets can contain sweeteners such as maltitol.

What is maltitol?

Maltitol is a sugar alcohol used as a sugar substitute. Some people find it affects their blood sugar or causes digestive discomfort, especially in larger amounts. That is why these cupcakes are best enjoyed in moderation.

Is peanut butter keto friendly?

Yes, peanut butter can be keto friendly, but it is best to choose natural peanut butter with no added sugar. Always check the label, as some peanut butters contain added sweeteners or oils.

Can I make these without the Reese’s peanut butter cups?

Yes. Leave out the peanut butter cups and you will still have a tasty keto chocolate cupcake. This will also reduce the carbs per cupcake slightly.

Can I make plain keto cupcakes instead?

Yes. Leave out the cocoa powder for a plain keto cupcake base. You can then flavour the frosting with vanilla, peanut butter or cocoa depending on what you fancy.

Final Thoughts On These Keto Reese’s Peanut Butter Cupcakes

These Keto Reese’s Peanut Butter Cupcakes are a lovely low-carb treat when you want something sweet, chocolatey and a bit more fun than a square of dark chocolate. The hidden peanut butter cup centre makes them feel properly indulgent, while the almond flour sponge and sugar-free frosting keep them keto-friendly enough for an occasional dessert.

If you try them, let me know how they turn out, especially if you experiment with different peanut butter cups or frosting flavours.