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 minutes
Cook 1 minute
Total 5 minutes
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Ingredients
 
 

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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Comments

  1. 4 stars
    The recipe was super fun to make, a bit chaotic for me because I mixed up tablespoon with cups, but it tasted good and I loved how easy it was to make, using only things that basically everybody has in their household. It was a little bit crummy, it wasn’t tight but the taste made up for it, and it was good with the dark chocolate. And I added some whipped cream.
    Thank you Lauren!

  2. 5 stars
    I used whole wheat flour and it came out warm and crumbly!!!! So so good. I’ve never had a good mug cake before so this was a win!!!

  3. 5 stars
    I don’t usually comment on recipes, but I really love this one. I’ve found that just one tablespoon of sugar works for me. I also replace the oil with applesauce and it is still really good!

  4. I made this just as is – butter, milk, chocolate chips, oh my! New go to fave for this house. Word of caution – chips are HOT and will burn your mouth if you try to inhale right from the nuker, lol!!

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