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Mug full of banana mug cake sitting on a wooden plate with chocolate chips and ripe bananas to the side and a gold spoon.
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4.75 from 12 votes

Healthy Oatmeal Banana Mug Cake

A quick and easy on-demand treat for all those times you're craving something sweet and comforting yet halthful! This healthy Oatmeal Banana Mug Cake makes for a lovely breakfast, snack, or dessert. Change up the ingredients according to your nutritional needs!
Prep Time2 minutes
Cook Time3 minutes
Total Time5 minutes
Course: Breakfast
Cuisine: American
Servings: 1 Mug Cake
Calories: 418kcal
Author: Julia

Ingredients

  • 1 large egg
  • 4 Tbsp milk of choice or egg whites*
  • 1 large very ripe banana
  • ½ cup rolled oats
  • ½ tsp ground cinnamon
  • ¼ tsp sea salt
  • 1 Tbsp chocolate chips optional

Instructions

  • Add all of the ingredients except for the chocolate chips to a small blender. I use my Magic  Bullet, but a NutriBullet or any blender with a small carafe works. Note: If you’re making mug cakes for two people, double the recipe and use a regular sized blender.
    Ingredients for banana bread mug cake in a Magic Bullet blender, ready to be blended.
  • Blend until everything is completely combined and it appears as though all of the oats are well blended. Stir the chocolate chips into the batter.
    Banana bread mug cake batter in a small blender with chocolate chips sprinkled on top, ready to be mixed into the cake batter.
  • Pour the batter into a microwave-safe mug. To be safe, use a large mug to avoid any overflow.
    Cake batter in a mug with chocolate chips sprinkled on top, ready to microwave.
  • If you’d like, sprinkle extra chocolate chips on top of the batter. If you’re adding a tablespoon of butter, drop it into the center of the batter now.
  • Microwave for 3 minutes, or until the cake is cooked through.
    Finished banana bread mug cake in a mug with ripe bananas, a spoon, and chocolate chips to the side. Ready to serve.
  • Enjoy the mug cake as is, or drizzle with a little honey or pure maple syrup and add a pat of butter.

Notes

*Use regular milk, non-dairy milk or egg whites (if you keep a carton of egg whites on hand). My top two recommendations are either full-fat canned coconut milk or egg whites. The coconut milk makes the mug cake rich and dense, where the egg whites makes it fluffier and also adds more protein without adding fat.
Optional Additions:
1 Tbsp brown sugar or granulated sweetener of choice
1 Tbsp unsalted butter
An easy way to tell if the cake is fully cooked is by checking its internal temperature using a meat thermometer.
Cake is fully cooked once it reaches a temperature of 190 to 200 degrees Fahrenheit.
To check the temperature, simply insert an instant read thermometer into the center of the mug cake and wait until the numbers stop moving to get an accurate read. If need be, microwave for 20 to 40 seconds longer until the cake is cooked through (it should be fully cooked after 3 minutes).

Nutrition

Serving: 1Mug Cake | Calories: 418kcal | Carbohydrates: 56g | Protein: 16g | Fat: 15g | Saturated Fat: 6g | Polyunsaturated Fat: 3g | Cholesterol: 192mg | Sodium: 781mg | Fiber: 7g | Sugar: 15g