A deliciously addicting and easy Peanut Butter Mug Cake made with simple pantry ingredients combined in a cup and cooked in the microwave for 1 minute.

Peanut Butter Mug Cake with a spoon taking a bite out.

We love mug cakes here at TBFS. Don’t miss our hugely popular Vanilla mug cake or our chocolate and pumpkin mug cakes.

A lot of care went into perfecting this peanut butter mug cake and I’m so proud of how it turned out! The peanut butter makes it extra moist and flavorful.

Mug cakes are all the rage right now, and what’s not to love about an individual serving of cake that can be made and cooked in about 5 minutes?

Ingredients in Peanut Butter Mug Cake:

  • Pantry staples: Flour, sugar, and baking powder.
  • Milk. Or use a dairy-free substitute.
  • Butter or Oil.
  • Peanut butter. Any type of nut butter should work!
  • Vanilla extract.
  • Chocolate chips. Reese’s pieces would be delicious too!
The ingredients needed to make Peanut Butter Mug Cake.

Hot to Make Peanut Butter Mug Cake:

  1. Mix: flour, sugar, and baking powder in a microwave safe mug.
Flour in a mug surrounded by the ingredients needed to make peanut butter mug cake.

2. Stir in: milk, oil or melted butter, peanut butter and vanilla extract until smooth, being sure to scrape the bottom of the mug.

3. Add chips: Stir in chocolate chips.

Flour, peanut butter, butter, sugar and baking powder in a mug, ready to cook in the microwave.

4. Microwave for 70-90 seconds.

Peanut Butter cake cooked in a white mug, with chocolate chips on top.

Recipe Variations:

  • Swap the chips: sub peanut butter chips, white chocolate chips, toffee bits, Reese’s Pieces, chopped Reese’s Peanut Butter Cups etc.
  • Add Nutella: add a spoonful of Nutella before microwaving.
  • Chocolate PB mug cake: add 1-2 teaspoons of cocoa powder.
  • Gluten free: substitute gluten free flour.

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Recipe

Peanut Butter Mug Cake with a spoon taking a bite out.
Prep 4 mins
Cook 1 min
Total 5 mins
Add to Meal Plan

Video

Ingredients
 
 

  • ¼ cup all-purpose flour
  • 2 1/2 Tablespoons granulated sugar
  • ¼ teaspoon baking powder
  • 2 Tablespoons milk
  • 1 Tablespoon oil or melted Butter
  • 2 Tablespoons peanut butter
  • Dash vanilla extract
  • 1 Tablespoon chocolate chips , or a mini Reese’s pb cup

Instructions
 

  • Add flour, sugar, and baking powder to a mug and stir together.
    Flour in a mug surrounded by the ingredients needed to make peanut butter mug cake.
  • Stir in milk, oil or melted butter, peanut butter and vanilla extract until smooth, being sure to scrape the bottom of the mug. Stir in chocolate chips.
    Flour, peanut butter, butter, sugar and baking powder in a mug, ready to cook in the microwave.
  • Cook in microwave for 70-90 seconds* (until cake is just set, but still barely shiny on top). Allow to rest in microwave for 1 minute before consuming.

Notes

*Because all microwaves are different, it’s difficult to give a precise cook time. Start with 70 seconds, wait 1 minute while it cools, then look to see if it is set. Add an additional 15-25 seconds if needed. Allow it to rest in the microwave for 1 minute.
The trick with mug cakes is to stop cooking the cake earlier than you think, because you want it to be soft on the inside, and the cake will also continue to cook as it cools.
Variations:
  • Swap the chips: sub peanut butter chips, white chocolate chips, toffee bits, Reese’s Pieces, chopped Reese’s Peanut Butter Cups etc.
  • Add Nutella: add a spoonful of Nutella before microwaving.
  • Chocolate PB mug cake: add 1-2 teaspoons of cocoa powder.
  • Gluten free: substitute gluten free flour.

Nutrition

Calories: 632kcalCarbohydrates: 79gProtein: 14gFat: 31gSaturated Fat: 6gTrans Fat: 1gCholesterol: 5mgSodium: 221mgPotassium: 418mgFiber: 3gSugar: 44gVitamin A: 64IUVitamin C: 1mgCalcium: 114mgIron: 2mg

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About The Author

Lauren Allen

Welcome! I’m Lauren, a mom of four and lover of good food. Here you’ll find easy recipes and weeknight meal ideas made with real ingredients, with step-by-step photos and videos.

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  1. 5 stars
    Why, why do you tempt me with your delicious treats?! I am a sucker for all things chocolate and peanut butter, so naturally, I had to try this. I’m not lying when I say this could be my new favorite treat. It’s insanely easy to make, I almost always have the ingredients, and it always satisfies my ever present sweet tooth. I would highly recommend this to anyone.