Flourless 4-Ingredient Peanut Butter Mug Cake

Prep time: 3 minutes
Cook time: 2 minutes
Total time: 5 minutes
Servings: 1


  • 3 Tbsp (48 g) unsweetened peanut butter or 2 Tbsp crunchy peanut butter
  • 2 Tbsp (26 g) erythritol crystals or 1 Tbsp coconut sugar
  • 1 egg
  • 1/4 tsp baking powder
  • 1/4 tsp vanilla extract (optional)


  1. Place all ingredients into a large microwave safe mug and mix vigorously with a spoon to form a smooth batter.
  2. Microwave on high for 1 minute and 30 seconds. Check the cake after 1 minute and adjust the overall cooking time according to your microwave oven. Don’t overbake. Let cool until warm and serve.
Category: Desserts

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Lemon Cook

Simple recipes of healthy and delicious food

Hi, my name is Nastya! Welcome to the Lemon Cook, the website where I share my favorite recipes of healthy and delicious food.