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Blueberry Mug Cake

Keto Blueberry Mug Cake

This Keto Blueberry Mug Cake is a delicious keto dessert or breakfast that you can make in just 1 minute in the microwave.
4.29 from 14 votes
Course: Breakfast, Dessert, Snack
Cuisine: American
Prep Time: 5 mins
Cook Time: 1 min
Total Time: 6 mins
Servings: 1 Mug Cake
Calories: 369kcal
Author: Laura


  • 3 tbsp almond flour
  • 1/2 tsp baking powder
  • 1/2 tbsp allulose or other sugar substitute
  • 1 tbsp butter melted
  • 1 egg
  • 1/4 tsp vanilla extract optional
  • 15 blueberries

For the frosting

  • 1 tsp butter melted
  • 2 tsp heavy cream
  • 2 tsp powdered allulose or powdered erythritol


  • Spray or rub the inside of a microwave-safe mug with cooking oil or butter.
  • Mix the almond flour, baking powder, and allulose in a small bowl. Stir in the butter, egg and vanilla extract until smooth. Add the blueberries and stir gently to incorporate.
  • Pour the batter into the mug.
  • Cook in the microwave on high for 60 seconds.
  • If serving with the frosting, mix the butter, cream and powdered allulose until smooth. If too thick to drizzle, add extra cream. Drizzle over the mug cake. Serve.


If you wish to use coconut flour instead of almond, use just 1 tbsp.
Other types of sugar substitute can be used, like Swerve or erythritol. Remember that erythritol is 70% less sweet than allulose.
Some microwaves are more or less powerful. I cook mine for 60 seconds on full power in an 800-watt microwave. You may need to adjust the cooking type based on the wattage of your microwave. The top should be spongy and not wet.


Calories: 369kcal | Carbohydrates: 9g | Protein: 10g | Fat: 34g | Saturated Fat: 14g | Cholesterol: 219mg | Sodium: 447mg | Potassium: 61mg | Fiber: 3g | Sugar: 3g | Vitamin A: 864IU | Vitamin C: 2mg | Calcium: 204mg | Iron: 2mg

The information shown is an estimate provided by an online nutrition calculator. It should not be considered a substitute for a professional nutritionist’s advice.