A white cup filled with banana mug cake, topped with a scoop of ice cream and caramel drizzle, sits on a white saucer with bananas in the background.
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Banana Peanut Butter Mug Cake

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If you’re craving something warm, sweet, and comforting but don’t want to bake an entire cake, this Banana Peanut Butter Mug Cake is your go-to dessert! Ready in just minutes, this single-serve treat is soft, fluffy, and packed with rich banana flavor and creamy peanut butter goodness. It’s the perfect way to use up an overripe banana while satisfying your sweet tooth with wholesome ingredients.

A white cup filled with a baked dessert topped with a scoop of ice cream and caramel sauce, placed on a saucer with bananas in the background.

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Why You’ll Love This Recipe

This mug cake is naturally gluten-free, easy to make, and loaded with flavor. The banana keeps the texture moist and tender, while peanut butter adds richness and a nutty twist. With just the right amount of sweetness and a touch of vanilla, it tastes like a cross between banana bread and a peanut butter cookie—perfect for a quick snack or after-dinner treat.

Ingredients

Just a few pantry ingredients and a ripe banana are all you need to make this delicious mug cake.

A banana, almond flour, peanut butter, brown sugar, vanilla extract, egg, baking powder, and almond milk are arranged in small bowls on a marble surface.
  • Banana: Ripe bananas are naturally sweet and provide moisture, texture, and flavor.
  • Egg: Helps bind the ingredients and gives the mug cake a fluffy, cake-like texture.
  • Almond Flour: A gluten-free flour option that adds a slightly nutty taste and soft crumb. This can be substituted with all purpose flour.
  • Peanut Butter: Adds protein, creaminess, and depth of flavor. Choose natural peanut butter for a less processed option.
  • Baking Powder: Gives the mug cake a lift and keeps it light and airy.
  • Almond Milk: Adds moisture without making the batter too heavy. Regular milk can be substituted.
  • Brown Sugar: A touch of brown sugar deepens the sweetness with subtle caramel notes.
  • Vanilla Extract: Enhances the overall flavor and ties everything together.

How to Make Banana Peanut Butter Mug Cake

A quick and easy banana mug cake with almond flour.

A white mug containing mashed bananas sits on a speckled countertop.

Mash the banana.

A white mug filled with a yellow liquid, possibly a blended drink, with a dollop of nut butter on top; bowls with powder and sugar are in the background on a beige countertop.

Add the wet ingredients and mix.

A white mug on a countertop contains a mixture of liquid and dry ingredients, including flour and baking powder or powdered sugar.

Add dry ingredients.

A white mug filled with a yellowish batter sits on a speckled countertop.

Mix until smooth and microwave.

Recipe Tips & Variations

  • For extra texture, mix in a few dark chocolate chips, chopped nuts, or shredded coconut.
  • No almond flour? Substitute with oat flour or regular flour (if not gluten-free).
  • Need it dairy-free? This recipe is naturally dairy-free if you use almond milk and a dairy-free peanut butter.
  • Want it vegan? Try replacing the egg with a flax egg (1 tbsp ground flaxseed + 3 tbsp water, let sit for 5 mins).
  • Add spice: A pinch of cinnamon or nutmeg complements the banana beautifully.
A hand holds a spoonful of mug cake above a white mug filled with cake and ice cream, with bananas in the background.

Serving Suggestions

For extra texture, mix in a few dark chocolate chips, chopped nuts, or shredded coconut.

No almond flour? Substitute with oat flour or regular flour (if not gluten-free).

Need it dairy-free? This recipe is naturally dairy-free if you use almond milk and a dairy-free peanut butter.

Want it vegan? Try replacing the egg with a flax egg (1 tbsp ground flaxseed + 3 tbsp water, let sit for 5 mins).

Add spice: A pinch of cinnamon or nutmeg complements the banana beautifully.

A white mug filled with banana peanut butter mug cake, topped with a scoop of ice cream and caramel sauce, placed on a napkin with bananas in the background.

More Banana Mug Cake Recipes

Turn that ripe banana into a delicious mug cake with these recipes:

Banana Coconut Mug Cake

Banana Nutella Mug Cake

3 Ingredient Banana Mug Cake

Banana Rum Mug Cake

Vegan Banana Bread Mug Cake

A white cup filled with banana mug cake, topped with a scoop of ice cream and caramel drizzle, sits on a white saucer with bananas in the background.

Banana Peanut Butter Mug Cake

ChatGPT said:
A warm and fluffy banana peanut butter mug cake made with almond flour, peanut butter, and sweet ripe banana. Ready in minutes, this easy single-serve treat is perfect for a quick dessert or snack, with rich flavor and wholesome ingredients.
Prep Time 3 minutes
Cook Time 2 minutes
Total Time 5 minutes
Course Dessert
Cuisine gluten free
Servings 1 serving
Calories 442 kcal

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Ingredients
 
 

  • 1 banana ripe
  • 1 large egg
  • 3 tablespoons almond flour
  • 1 tablespoon peanut butter smooth
  • 1/2 teaspoon baking powder
  • 1 tablespoon almond milk
  • 1 tablespoon brown sugar
  • 1/4 teaspoon vanilla extract

Instructions
 

  • In a microwave-safe mug, mash the banana until smooth.
  • Add the egg and whisk until well combined.
  • Stir in the almond flour, peanut butter, baking powder, almond milk, brown sugar, and vanilla extract. Mix until you get a smooth batter.
  • Microwave on high for 1 minute and 30 seconds to 2 minutes, depending on your microwave’s power.
  • Let cool for a minute before digging in. Optional: top with a dollop of yogurt, sliced banana, or a drizzle of extra peanut butter.

Notes

Makes 1 Serving.

Nutrition

Serving: 1servingCalories: 442kcalCarbohydrates: 48gProtein: 16gFat: 24gFiber: 6gNet Carbs: 42g

The information shown is an estimate provided by an online nutrition calculator.

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