3 Ingredient Keto Chocolate Mug Cake

Prep Time: 5 minutes
Cook Time: 1 minute
Total Time: 6 minutes
Course: Dessert
Cuisine: American
Servings: 1

An easy cake that cooks in the microwave. This chocolate mug cake is just 3 ingredients and is low carb, gluten free and keto friendly. 


  • 1 large egg
  • 1 tbsp + 1/2 tsp Natural Mate All Purpose Granular Stevia or sugar substitute of your choice equivalent to 2 tbsp + 1 tsp sugar
  • 1 3/4 tbsp unsweetened dutch process cocoa powder


  1. In a microwave-safe mug that holds at least 8 oz of liquid, add all ingredients.

  2. Whisk with a small whisk until batter is completely smooth and egg has been fully beaten and incorporated into batter. 

  3. Cook in the microwave at full power for about 45 seconds. I use a 1000 watt microwave. If your microwave power is less or more, please adjust cooking time and/or cooking power accordingly. Let the cake cool a few minutes before eating. Cake is best eaten warm with toppings. 


  • For the sugar substitute, I used Natural Mate Stevia All Purpose Natural Sweetener*
  • If you have a favorite keto friendly sugar substitute, it will likely work with this recipe. Just make sure you add the equivalent of 2 tbsp + 1 tsp of sugar.
  • I use a 1000 watt microwave. If your microwave power is less or more, please adjust cooking time and/or cooking power accordingly.
  • The cake is best enjoyed warm as it does tend to get a little dry if left to sit for several hours.
  • I do find the cake a little plain on its own, so I would recommend adding toppings. Some toppings I've used include fresh berries, sugar free chocolate syrup and powdered sugar substitute (like swerve)
  • *Some of the product links contained in this post are affiliate links. Much like referral codes, this means I earn a small commission if you purchase a product I referred (at no extra charge to you).

Estimated Nutrition Information does not include toppings or carbs from erythritol

Nutrition Facts
3 Ingredient Keto Chocolate Mug Cake
Amount Per Serving
Calories 102 Calories from Fat 54
% Daily Value*
Fat 6g9%
Saturated Fat 2g13%
Cholesterol 210mg70%
Sodium 82mg4%
Potassium 222mg6%
Carbohydrates 5g2%
Fiber 3g13%
Protein 8g16%
Vitamin A 305IU6%
Calcium 44mg4%
Iron 2.3mg13%
Net Carbs 2g4%
* Percent Daily Values are based on a 2000 calorie diet.
The nutrition information provided are only estimates based on an online nutritional calculator. I am not a certified nutritionist. Please consult a professional nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have. All images and content are © Kirbie's Cravings.

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