This 3-Ingredient Keto Peanut Butter Mug Cake is the perfect low-carb dessert for peanut butter lovers! This flourless peanut butter mug cake is gluten-free, sugar-free, and ready in just 90 seconds.
This easy keto peanut butter mug cake recipe is rich in peanut butter flavor, super soft, and fluffy. Whether you’re craving a sweet treat or need a quick fix for your sweet tooth, this keto mug cake will hit the spot without ruining your diet.
Why You’ll Love This Easy Keto Mug Cake
- Only 3 Simple Ingredients! No complicated steps, just quick and easy.
- Flourless & Low-Carb. Perfect for a keto diet, diabetic-friendly, and gluten-free.
- Ready in 90 Seconds! Satisfy your sweet cravings in no time.
- Peanut Butter Lover’s Dream. Rich, creamy, and full of peanut butter goodness.
- Microwave-Friendly. Made in a microwave-safe mug for ultimate convenience.
Watch me make this recipe in my quick video – it’s like cooking together in the kitchen!
Ingredients
- large egg (room temperature)
- natural peanut butter (sugar-free and unsweetened)
- Swerve sweetener (or any keto-friendly sweetener)
Instructions
Cool & Enjoy: Let the cake cool slightly before enjoying. Add toppings like sugar-free chocolate chips, whipped cream, or a drizzle of peanut butter sauce.
Whisk the Egg: In a small mixing bowl, whisk the egg until light and fluffy. This creates an airy texture in the mug cake.
Melt the Peanut Butter: Microwave the creamy peanut butter in a microwave-safe bowl for 15 seconds until soft. Be careful not to overheat.
Combine Ingredients: Mix the sweetener into the melted peanut butter until smooth. Add the whisked egg and stir until fully combined.
Microwave: Pour the mug cake batter into a large microwave-safe mug and microwave for 90 seconds. Cooking time may vary, so check for doneness.
I’m proud to present my own keto coffee mug design, which I use to bake my yummy keto mug cakes.
Recipe Tips for the Best Mug Cake
- Use Natural Peanut Butter: Stick to unsweetened, sugar-free peanut butter for the best keto results.
- Check Sweetness: Taste the batter and adjust sweetness if needed.
- Microwave Time Varies: Start with 90 seconds and add extra time in 10-second intervals if necessary.
- Add Chocolate: Stir in sugar-free chocolate chips or cocoa powder for a chocolate peanut butter mug cake.
Ingredient Swaps
- Peanut Butter: Swap for almond butter or sunflower seed butter for a nut-free option.
- Sweetener: Use Monk Fruit, Erythritol, or your favorite keto-friendly sugar substitute.
- Chocolate Twist: Add unsweetened cocoa powder for a healthy peanut butter mug cake with chocolate flavor!
Storage Tips
- Best Fresh: This mug cake is best enjoyed right after cooking.
- Prep Ahead: Mix the batter in advance and store it in the fridge for up to 24 hours. Microwave when ready!
- Not Freezer-Friendly: This recipe doesn’t freeze well, but you can portion and freeze the batter in silicone molds for quick treats.
Conclusion
This 3 Ingredient Keto Peanut Butter Mug Cake Easy Recipe is your go-to for a quick, delicious, and satisfying dessert. This gluten-free mug cake is rich, fluffy, and packed with peanut butter flavor, all while being low carb, gluten-free, and sugar-free. Ready in just 90 seconds, this low carb mug cake is perfect for anyone craving a sweet treat without the guilt.
Try this 3 ingredient peanut butter mug cake today and let me know how you like it!
10 Keto Mug Cake Recipes You’ll Love: Gluten Free, Sugar Free
FAQs
Q: How many carbs are in this keto peanut butter mug cake?
A: This easy peanut butter mug cake recipe has only 4.9g net carbs per serving, perfect for a low-carb or keto diet.
Q: Can I make this without a microwave?
A: Yes! Bake it in a ramekin at 350°F (175°C) for 10-12 minutes.
Q: Can I add chocolate chips to this mug cake?
A: Absolutely! Use sugar-free chocolate chips for a chocolate peanut butter combo.
Q: Can I replace peanut butter with almond butter?
A: Yes! Almond butter works well, but it may slightly change the carb count.
More Keto Recipes to Try!
- 10 Keto Mug Cake Recipes
- High Protein Cottage Cheese Chocolate Peanut Butter Mug Cake
- Keto Brownie Mug Cake: Flourless
- Keto Peanut Butter Mug Cake With Coconut Flour
- Keto Strawberry Mug Cake
- Keto Blueberry Mug Cake With Coconut Flour
- Keto Chocolate Mug Cake With Coconut Flour
3-Ingredient Keto Peanut Butter Mug Cake
Equipment
- 1 Spatula
Ingredients
- 2.5 tablespoons natural peanut butter
- 2 tablespoons swerve
- 1 large egg
- 1 tablespoon natural peanut butter for decoration (optional)
Instructions
- In a small mixing bowl, whisk the egg until light and fluffy. This creates an airy texture in the mug cake.
- Microwave the creamy peanut butter in a microwave-safe bowl for 15 seconds until soft. Be careful not to overheat.
- Mix the sweetener into the melted peanut butter until smooth. Add the whisked egg and stir until fully combined.
- Pour the mug cake batter into a large microwave-safe mug and microwave for 90 seconds. Cooking time may vary, so check for doneness.
- Let the cake cool slightly before enjoying. Add toppings like sugar-free chocolate chips, whipped cream, or a drizzle of peanut butter sauce.
Video Recipe
Notes
- Use natural, unsweetened peanut butter for best keto results.
- Adjust sweetness by adding more or less keto sweetener.
- Microwave power varies—start with 90 seconds and check for doneness.
- Add sugar-free chocolate chips for a chocolatey twist!
