Easy Keto Chocolate Peanut Butter Mug Cake Recipe for Quick Desserts

Indulge in a Keto Chocolate Peanut Butter Mug Cake

Craving something sweet but following a strict keto diet? Fear not, because the Keto Chocolate Peanut Butter Mug Cake is here to satisfy your sweet tooth without the guilt. This single-serve dessert is not only rich and moist but also perfectly aligns with your low-carb, high-fat dietary needs. With its creamy peanut butter and intense chocolate flavors, it’s a quick and decadent treat that you can whip up in just minutes.

Whether you’re looking for a quick keto snack or a luxurious low-carb dessert, this mug cake is your perfect companion. It’s designed for those moments when you need a little indulgence without compromising your diet. Plus, it’s incredibly easy to make, which means you can enjoy this delightful dessert anytime, anywhere!

Keto Chocolate Peanut Butter Mug Cake

The Perfect Keto Dessert

As a lover of all things sweet and a follower of the keto lifestyle, I’ve always been on the lookout for recipes that can satisfy cravings without breaking the carb bank. That’s how the Keto Chocolate Peanut Butter Mug Cake came into existence. It’s a culmination of my passion for dessert and my commitment to a healthy, ketogenic diet.

This mug cake is a powerhouse of keto-friendly ingredients. Almond flour serves as a fantastic low-carb base, while unsweetened cocoa powder adds that rich chocolatey flavor without the added sugars. The use of erythritol, a natural keto sweetener, keeps the carbs in check while delivering the sweetness we all crave. And let’s not forget the peanut butter – not only does it add a creamy texture and depth of flavor, but it’s also a great source of healthy fats and protein, which are essential in a keto diet.

Each ingredient has been carefully selected to create a balance of flavor and nutrition. The result is a dessert that’s not just delicious but also aligns with the nutritional goals of a ketogenic lifestyle. It’s a dessert that provides energy, satisfies hunger, and makes you feel good about your food choices.

Mixing Ingredients for Keto Mug Cake

Mastering the Method

Creating the perfect Keto Chocolate Peanut Butter Mug Cake is an art that requires attention to detail. The key to a moist and flavorful cake lies in the method. Here’s how to elevate your mug cake game with some chef’s tips:

Tip #1: When mixing your dry ingredients, ensure there are no lumps. This step is crucial for a smooth batter, which translates to an even texture in your cake. A fork or a small whisk can be your best friend here, allowing you to combine everything thoroughly.

Tip #2: The peanut butter ‘core’ is the heart of this cake. By adding it in the center without stirring, you create a molten surprise that oozes out as you dig in. For a more intense flavor, choose a natural peanut butter with no added sugars or oils.

Tip #3: Watch the microwave closely. All microwaves are different, and cooking times can vary. Start checking your cake at 50 seconds to prevent overcooking. You’re aiming for a cake that’s cooked through but still moist and tender.

Keto Mug Cake in Microwave

Variations to Keep It Exciting

Coconut Delight

If you’re a fan of coconut, try adding unsweetened shredded coconut to the batter for a tropical twist. Not only does it add flavor, but it also provides an interesting texture. You can even top your mug cake with a sprinkle of toasted coconut flakes for added crunch.

Berry Blast

For a fruity variation, gently fold in a handful of fresh or frozen raspberries or blueberries before cooking. The berries will add a natural sweetness and a pop of color, making your mug cake even more irresistible.

Espresso Infusion

Enhance the chocolate flavor with a hint of espresso. Add a teaspoon of instant espresso powder to the dry ingredients to give your mug cake a sophisticated coffee twist. It’s perfect for coffee lovers and chocolate enthusiasts alike.

Substitutions for Every Preference

It’s essential to have substitutions on hand to cater to different dietary needs or simply to work with what you have in your pantry. Here are some keto-friendly swaps:

Almond Flour Alternatives: If you’re allergic to almonds, coconut flour is an excellent substitute. Remember, it’s highly absorbent, so you’ll need less of it – about 1 tablespoon should do the trick.

Sweetener Swaps: While erythritol is a great keto sweetener, you can also use other sugar alternatives like stevia or monk fruit sweetener. Adjust the amount to achieve your desired level of sweetness.

Dairy-Free Options: If you’re avoiding dairy, you can replace the almond milk with coconut milk or any other non-dairy milk of your choice. Just ensure it’s unsweetened to keep the carbs low.

Frequently Asked Questions

Can I bake this mug cake in an oven? Yes, you can bake it at 350°F (175°C) for 12-15 minutes if you don’t have a microwave. Just keep an eye on it and use a toothpick to test for doneness.

How can I make this mug cake nut-free? Substitute almond flour with coconut flour, but remember to use less as it’s more absorbent. A tablespoon should suffice.

Is this mug cake freezer-friendly? While it’s best enjoyed fresh, you can freeze it. Just wrap it well and when you’re ready to eat, thaw and reheat in the microwave for a few seconds.

Can I add toppings to my mug cake? Absolutely! Consider toppings like whipped cream, a drizzle of keto-friendly chocolate syrup, or a sprinkle of chopped nuts for extra texture and flavor.

How do I know if my mug cake is cooked? The cake should rise and the top should be set. If it’s still a bit moist in the center, that’s okay – it will continue to cook slightly as it cools, giving you a gooey center.

Keto Chocolate Peanut Butter Mug Cake

Indulge in a quick, decadent treat with this Keto Chocolate Peanut Butter Mug Cake. Perfect for satisfying your sweet tooth without the guilt, this single-serve dessert is rich, moist, and loaded with creamy peanut butter and chocolate flavors.
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Prep Time 5 minutes
Cook Time 1 minute
Total Time 6 minutes
Course Desserts
Cuisine American
Servings 1 serving
Calories 345 kcal


  • Microwave-safe mug
  • Measuring spoons
  • Fork or small whisk


  • 2 tablespoons Almond flour 30g
  • 1 tablespoon Unsweetened cocoa powder 15g
  • 2 tablespoons Erythritol 24g
  • ¼ teaspoon Baking powder 1g
  • 1 large Egg
  • 1 tablespoon Unsweetened almond milk 15ml
  • 2 tablespoons Natural peanut butter 32g
  • ½ teaspoon Vanilla extract 2.5ml
  • 1 tablespoon Sugar-free dark chocolate chips 15g
  • Pinch of salt


  • Lightly grease the inside of a microwave-safe mug with a bit of oil or non-stick cooking spray to prevent sticking.
  • In the mug, combine the almond flour, unsweetened cocoa powder, erythritol, baking powder, and a pinch of salt. Mix well to ensure there are no lumps.
  • Crack the egg into the mug with the dry ingredients. Add the unsweetened almond milk and vanilla extract. Stir thoroughly until you have a uniform batter.
  • Drop the peanut butter into the center of the batter, not stirring it in, to create a peanut butter 'core' once the cake is cooked.
  • Top the batter with sugar-free dark chocolate chips.
  • Place the mug in the microwave and cook on high for about 60 seconds. Microwave times may vary, so check the cake at 50 seconds to ensure it doesn't overcook. The cake should be moist but not liquid.
  • Allow the cake to cool for a minute or two. It can be enjoyed straight from the mug or turned out onto a plate.


For a nut-free version, substitute almond flour with coconut flour, but reduce the amount to 1 tablespoon as coconut flour is more absorbent.
Adjust the sweetness to your taste; some might prefer a little more or less erythritol.
If you don't have a microwave, this cake can be baked in an oven-safe dish at 350°F (175°C) for 12-15 minutes. Just be sure to check for doneness with a toothpick.
Always remember that microwave wattages vary, and cooking times may need to be adjusted accordingly.


Calories: 345kcalCarbohydrates: 12gProtein: 13gFat: 28gFiber: 8gNet Carbs: 4g
Keyword keto dessert, Keto Mug Cake, Low-Carb Chocolate Cake, Peanut Butter Mug Cake, Quick Keto Snack
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