Nothing beats our easy Peanut Butter Mug Cake that's moist, flavorful, and ready in less than 5 minutes. Grab a few pantry staples and let's satisfy your sweet tooth!
5-minutes is all you need for a Peanut Butter Mug Cake
5-minutes is all you need for a Peanut Butter Mug CakeNo dessert can satisfy my sweet tooth quicker than a individual-sized mug cake and this peanut butter version is so moist and the flavor is spot on. The trick with mug cakes is to stop cooking the cake earlier than you think; you want it soft on the inside, and it will continue to cook as it cools. I stop the microwave when the top of the cake is just barely still shiny.
In my house, we make mug cakes a lot because it's a treat the kids can make themselves. Make sure to try our other popular versions: Vanilla Mug Cake, Chocolate Mug Cake, Pumpkin Mug Cake, and Oreo Mug Cake!
How to make a Peanut Butter Mug Cake:
Combine: Mix flour, sugar, and baking powder in a microwave safe mug then stir in milk, oil or melted butter, peanut butter, and vanilla extract. Stir in chocolate chips.
Microwave for 70-90 seconds. The cake should be just set, but still barely glossy/shiny on top. Allow it to rest in the microwave for 1 minute before enjoying the best little peanut butter mug cake ever.
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Recipe
Peanut Butter Mug Cake
Equipment
Ingredients
- ¼ cup all-purpose flour (31g)
- 2 1/2 Tablespoons granulated sugar
- ¼ teaspoon baking powder
- 2 Tablespoons milk
- 1 Tablespoon vegetable oil , or melted butter
- 2 Tablespoons creamy peanut butter
- 1 dash vanilla extract
- 1 Tablespoon chocolate chips , or a mini Reese’s pb cup
Instructions
- Add flour, sugar, and baking powder to a mug then stir together.¼ cup all-purpose flour, 2 ½ Tablespoons granulated sugar, ¼ teaspoon baking powder
- 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.2 Tablespoons milk, 1 Tablespoon vegetable oil, 2 Tablespoons creamy peanut butter, 1 dash vanilla extract, 1 Tablespoon chocolate chips
- 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
- 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
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I originally shared this recipe February 2021. Updated April 2025.
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Was sooo delicious and I have tried my fair share of recipes
I subbed in brown sugar for regular sugar and went light on the oil to make up for the added moisture and added a teaspoon of peanut butter in the center for a molten center instead of chocolate chips and I don’t know what messed it up it obviously could’ve been me but like with every peanut butter mug cake I’ve tried it just ended up mush
If you give the original recipe a try as written, it should come out with that perfect fluffy texture!
Stacy
Why would you give a bad review to a recipe you completely changed?
Very crumbly light fluffy texture but not enough peanut flavor. Followed recipe and added choc chips. It really would be better with some pb cups or pb candies but I’m disappointed in the floury flavor and probably won’t try this recipe again.
I need gluten free so I used Bob’s Red Mills 1 for 1. It turned out quite crumbly but delicious. My flour mix has some xanthan gum but for people using gf it might be good to add a tiny bit of more xanthan gum or perhaps an 1/8 tsp of flax meal to the milk for more binding.
Delicious and moist! I substituted almond milk to make it vegan, and it came out perfect.
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!
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!!!
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!
Tasty and easy!
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!!