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Easy 3 Ingredient Peanut Butter Mug Cake

  • Author: Listotic


This easy peanut butter mug cake is moist, fudgy, made in the microwave. The best part is it’s ready in under 5 minutes! Add in some chocolate chips or an extra drizzle of peanut butter on top for the most delicious mug cake recipe.


  • 1 Egg
  • 3 tbsp unsweetened peanut butter
  • 2 large tbsp white sugar (a little less if your peanut butter is sweetened)


  1. Combine all of the ingredients into a mug, and whisk with a fork until COMPLETELY blended. This may take a little elbow grease.
  2. Microwave for approximately 1 minute (I have a very high powered microwave, so maybe a little longer depending on the wattage).
  3. That’s it! Enjoy! You will be pleasantly surprised how how tasty this easy mug cake is!


  • Try adding a handful of chocolate chips to the batter before microwaving.
  • Top it with a scoop of ice cream or a dollop of Nutella.
  • Try replacing 1 tbsp of the peanut butter for Nutella before microwaving.
  • I use creamy peanut butter for this recipe but you can also use chunky, just depending on whether you want a little crunch!
  • If you’re watching your calorie intake, you can replace the sugar with a sugar substitute such as Stevia.