Keto peanut butter mug cake

Keto Peanut Butter Mug Cake

Peanut flour makes delicious low carb baked goods like this easy keto peanut butter mug cake. Fluffy, and rich tasting, this dessert will feel like cheating instead of treating!
Course Dessert
Cuisine American
Keyword mug cake, peanut butter
Servings 1
Calories 210kcal
Author Kim Hardesty


  • 3 tbsp peanut flour
  • 1 tbsp Low carb brown sugar (or your favorite sweetener)
  • 1/4 tsp baking powder
  • 1 pinch salt
  • 1 large egg yolk
  • 1 tbsp mayonnaise*
  • 1 tsp water


  • Mix the dry ingredients together in a mug with a fork.
  • Add the egg yolk, mayonnaise, and water, blending completely.
  • Microwave for 50 seconds (depending on your microwave). Let cool for 1 minute before enjoying.
  • Nutritional Information: Calories 195, Fat 17, Carbohydrates 4, Fiber 2, Protein 9
  • NOTE: To make this Chocolate-Peanut Butter: Reduce peanut flour to 1 1/2 tablespoons and add 1 tablespoons unsweetened cocoa powder. (Make sure the cocoa powder has been sifted and is free of lumps.)
  • * Don't like mayonnaise. Try subbing with sour cream. If it is a little too dry, add 1 tsp of oil with the sour cream.


Calories: 210kcal | Carbohydrates: 4.6g | Protein: 10.7g | Fat: 17.5g | Cholesterol: 210mg | Sodium: 528mg | Fiber: 2g | Sugar: 1.1g