Peanut Butter Chocolate Mug Cake

Peanut butter chocolate mug cake is a delicious single-serve dessert you can make in the microwave in minutes.

peanut butter chocolate mug cake

I am obsessed with mug cakes. It’s like some kind of dessert miracle that you can have an ooey-gooey, decadent treat in minutes and all you need is a coffee mug, a microwave and a handful of ingredients you most likely already have on hand.

I have been making my famous chocolate mug cake for years and today I want to share another amazing mug cake recipe. If you are a fan of the classic peanut butter and chocolate combo, you’re going to love this Reese’s Peanut Butter chocolate mug cake. It is sinful!

The next time you need a little single-serve bite of warm chocolate goodness to satisfy your sweet tooth, whip this peanut butter mug cake. It’s quick and easy and just plain delicious.

I like to undercook my mug cake so there’s more “lava” and less “cake”. In my microwave, it only takes 35 seconds to get gooey chocolate peanut butter perfection.

I will note that the quality of cocoa powder makes a big difference in the taste of this recipe. If you buy a cheap brand, it won’t taste nearly as good. I have had good success with Hershey’s Cocoa.

peanut butter chocolate mug cake recipe

5 from 1 vote
Peanut Butter Chocolate Mug Cake

Make a decadent single-serve dessert in a coffee cup in the microwave. It's so easy and only takes a few minutes!

Author: Jennifer from The Craft Patch
  • 2 tablespoons butter
  • 2 tablespoons water
  • 1/4 teaspoon vanilla
  • 1 pinch salt
  • 1/4 cup white sugar
  • 1/4 cup flour
  • 2 tablespoons cocoa powder
  • Reeses Peanut Butter Cups or chocolate chips optional
  • 1 tablespoon peanut butter
  1. Melt the butter in a coffee mug.  

  2. Add water, vanilla and salt and stir until smooth. 

  3. Add sugar, cocoa powder and flour and stir until all the lumps are out. Add the peanut butter in one clump in the center of the mug and only stir it in a little bit. You want a big, melty tunnel of peanut butter in the center once it's done.

  4. Cook in the microwave for 30-40 seconds. If you want less "lava" and more cake you can cook it for 10 seconds more. 

Recipe Notes

You may have to adjust the cooking time since all microwaves cook at different speeds. Cook in 15 second intervals until the desired consistency is reached.


Don’t miss my other favorite chocolate dessert recipes.

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peanut butter and chocolate mug cake dessert


  1. 5 stars
    There is nothing wrong with this, yo!!! Lol my husband wanted another one until I told him how much sugar was in one of them. Sooo good! Worth it! Thanks for the delicious recipe.


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