Name: Peanut Butter Mug Cake
Prep time: 4 min
Cook time: 1 min
Total time: 5 min
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)

This post contains affiliate links.

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!

The best Peanut Butter Mug Cake recipe in a white mug with a few chocolate chips on top and a spoon scooping up a bite.

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.

Two images showing how to make a peanut butter cake in a mug by mixing the ingredients then microwaving until set and sprinkling some chocolate chips on top.

Save Print Pin Review Add as a trusted Google source

4.79 from 82 votes

Peanut Butter Mug Cake

Author: Lauren Allen

Our easy Peanut Butter Mug Cake is moist, flavorful, and ready in 5 minutes.

Prep: 4

Cook: 1

Total: 5

Servings:

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

*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: 634kcal, Carbohydrates: 72g, Protein: 11g, Fat: 36g, Saturated Fat: 9g, Polyunsaturated Fat: 12g, Monounsaturated Fat: 11g, Trans Fat: 0.1g, Cholesterol: 4mg, Sodium: 256mg, Potassium: 303mg, Fiber: 2g, Sugar: 43g, Vitamin A: 49IU, Calcium: 127mg, Iron: 2mg

Nutrition information is automatically calculated, so should only be used as an approximation.