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
No 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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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
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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
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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
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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.
Video
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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