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Microwave Banana Cake (in a Mug)

When you need a quick dessert and don’t want to make a whole cake, try this microwave banana cake in a mug. Easy to make with just a few simple ingredients, this cake comes together in just minutes.

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Microwave banana cake in a mug with sliced banana on top.
Microwave banana cake in a mug.

Why you’ll love this recipe

  • It only takes around 5 minutes to make
  • It is made with pantry staple ingredients
  • Because it’s made with banana it must be healthy – right?

On those days when you need a quick and easy dessert, look no further than this microwave banana mug cake! Enjoy it warm and fresh out of the microwave topped with caramel sauce or a big scoop of ice cream.

Bonus: This is a no egg recipe and can be made vegan if you use plant-based milk. This recipe is based on my 5-ingredient vegan banana bread recipe, but smaller, and faster!

Scroll down for the printable card for this microwave banana cake recipe, or read on for all the details.

A spoonful of banana mug cake.

What do you need?

A mug or small microwave-safe baking dish

The mug I use to make this cake has a capacity of around 1½ cups (12 oz, 350ml). The cake mix will approximately double in size as it cooks (then subside a little), so make sure your mug is big enough or it may overflow during cooking!

Ingredients and substitutions

Flat-lay photo of the ingredients for this microwave banana cake recipe.

Mashed banana

Half a medium banana is the right amount for one of these cakes. This is perfect if you need to make two desserts. Or you can store the other half of the banana in the fridge (wrapped in plastic wrap), and make yourself another cake tomorrow!


All-purpose flour is the best. I wouldn’t recommend using bread flour as the cake will be chewy rather than crumbly. You can substitute self-raising flour if you have it, and skip the baking soda.


The recipe below uses soft brown sugar, but you can substitute white/granulated sugar if that is what you have.

Baking soda

This cake needs a little help rising since the cooking time is so quick, so you will need a little baking soda (note: not baking powder).


The recipe below uses light olive oil, but you can use vegetable oil, avocado oil, or melted butter.


I normally use regular full-fat milk for this recipe. However, if you want a vegan version of this recipe, remember to substitute a plant-based milk. I have used soy milk to make this recipe successfully, but I would expect that most other plant-based milks would also work.

Banana mug cake with a white jug of caramel sauce.
Serve banana mug cake topped with caramel sauce or ice cream.

How to make banana cake in a mug

This recipe is very simple to make, there are just a few quick steps:

  • Mash the banana in a mug until it is smooth. Then add the sugar, oil, and milk, and stir to combine well.
  • Mix the flour and baking soda together in a separate bowl, then add to the mug and mix well.
  • Cook the banana cake in the microwave for 3 minutes. You should see it rise up and subside a little (hopefully your mug is big enough and it doesn’t overflow!).

Serve the banana cake warm from the microwave with a big scoop of vanilla ice cream, or topped with sliced bananas and drizzled with caramel sauce. Enjoy!

Microwave banana cake in a mug with sliced banana on top.
Yield: 1 Serving

Microwave Banana Cake in a Mug

Prep Time: 2 minutes
Cook Time: 3 minutes
Total Time: 3 minutes

How to make microwave banana cake in a mug.


  • ½ medium banana
  • 3 tablespoons soft brown sugar
  • 2 tablespoons light olive oil [Note 1]
  • 1 tablespoon milk, plant-based or dairy
  • 4 tablespoons all-purpose flour
  • ½ teaspoon baking soda


  1. Slice the banana into the mug and mash with a fork until smooth.
  2. Add the sugar, oil and milk to the mug and stir to combine.
  3. Mix the flour and baking soda together, then add to the mug, and mix well.
  4. Cook banana cake in microwave on high for 3 minutes (you may need to adjust the time slightly up or down depending on your microwave's power).
  5. Top with ice-cream, and eat straight from the mug.


  1. Or use vegetable oil, avocado oil, melted butter, or another cooking oil with a neutral flavor.

Nutrition Information:



Serving Size:


Amount Per Serving: Calories: 538Total Fat: 28gSaturated Fat: 4gTrans Fat: 0gUnsaturated Fat: 23gCholesterol: 1mgSodium: 647mgCarbohydrates: 71gFiber: 2gSugar: 40gProtein: 4g

Nutrition information is an estimate and provided for informational purposes only.

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Welcome to Love Food Not Cooking!

I’m Eliza, busy mom, home cook, and blogger. My goal is to help everyone cook good food. Whether you are short on time, skills, or motivation, there is something here for you! We have dozens of quick and easy recipes for dinner, lunch, side dishes, and more. Our recipes use everyday ingredients, for quick delicious meals your family will love! Read more…

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