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Home » Breakfast » Overnight oats and oatmeal

Blueberry Oatmeal Mug Cake

Modified: Jan 19, 2025 · Published: May 28, 2018 by Helena

↓ Jump to Recipe

Blueberry Oatmeal Mug Cake, a single-serving microwave recipe that is ready in just 5 minutes! Full of healthy ingredients and sweet, juicy blueberries, like starting your day with dessert that is actually good for you.

 

Oatmeal Blueberry Mug Cake topped with fresh blueberries.

If you’re in a rush in the mornings, but still want a healthy, filling breakfast this recipe is the perfect thing!

Jump to:
  • Ingredients
  • Instructions
  • Substitutions and Variations
  • Storage
  • Oatmeal recipes
  • Blueberry recipes
Oatmeal Blueberry Mug Cake

Ingredients

  • Banana, very ripe, mashed
  • Quick cooking oats, they have a finer texture then rolled oats and cook quickly in the microwave. Can also be replaced with oatmeal flour.
  • Milk, of your choice, I used almond milk
  • Egg, or for a vegan option, use a flax egg.
  • Baking powder, to give it a lighter texture.
  • Vanilla or cinnamon, choose your favourite flavor to go in the mug cake or add both!
  • Salt, just a pinch to enhance the flavours.
  • Honey or maple syrup, optional for a sweeter mug cake.
  • Blueberries, fresh or frozen. Some to go inside the mug cake and a little extra for topping.

See recipe card for quantities.

For more quick and healthy breakfast recipes try my Cookie Dough Overnight Oats or this Banana bread baked oats.

Instructions

  1. In a large microwave safe mug, add the banana and mash well. 
  2. Add the oats, milk, egg, vanilla, baking powder, salt and honey or maple syrup (if using sweetener) Stir well until everything is incorporated. Gently fold in the fresh or frozen blueberries.
  3. Cook on hight heat in the microwave for 2-3 minutes or until set. Top with more blueberries, yoghurt and some maple syrup if desired.

For more baked oatmeal recipes check out these delicious Apple pie baked oats or this Carrot cake baked oatmeal.

Oatmeal Blueberry Mug Cake

Substitutions and Variations

  • Nuts – Add some chopped nuts for some crunch and extra protein.
  • Protein – for added protein, mix in 1 tablespoons of your favourite protein powder with an extra tablespoon of milk.
  • Gluten-free – Although oats are naturally gluten-free, they can contain traces of gluten. To ensure a gluten-free dish, use certified gluten-free oats.
  • Sweetener – This oat mug cake recipe is not overly sweet. Most of the sweetness comes from the ripe bananas. For a sweeter dish add some maple syrup or honey, or other liquid sweetener or brown sugar can also be used.
  • Vegan – for a vegan mug cake recipe, use a plant based milk and replace the egg with a flax egg.
  • Berries – Use fresh or frozen blueberries or other berries like raspberries or blackberries.

For more blueberry recipes, check out these Banana blueberry oatmeal muffins or this creamy Blueberry Chia Pudding.

Oatmeal Blueberry Mug Cake

Storage

This recipe makes one portion and tastes best when eaten straight away. If you have leftovers, they can be stored in an airtight container or ziplock bag in the fridge for up to 4 days. 

Eat leftovers cold or reheat in the microwave. Serve with some vanilla yoghurt and toppings of choice.

Oatmeal recipes

  • The baked oatmeal topped with yoghurt and fresh berries.
    Vegan Baked Oatmeal
  • Pouring maple syrup over a pice of overnight oats topped with blackberries.
    Blackberry Baked Oatmeal
  • The baked oatmeal in the baking dish cut into slices.
    Peach baked oatmeal
  • A slice of the baked oats on a small plate topped with yoghurt, strawberries and maple syrup.
    Strawberry Rhubarb Baked Oatmeal

Blueberry recipes

  • Peach Blueberry Smoothie served in 2 tall glasses topped with mint, blueberries and a slice of peach.
    Peach Blueberry Smoothie
  • Blueberry Bread cut in slices on a cutting board.
    Blueberry Bread
  • Banana blueberry oatmeal muffins on a cooling rack.
    Banana blueberry oatmeal muffins
  • Blueberry Chia Pudding served in to glasses topped with yoghurt and fresh blueberries.
    Blueberry Chia Pudding

I WOULD LOVE TO HEAR FROM YOU! 

Let me know what you think by leaving a comment down below and tagging me at @thedeliciousplate in your picture on Instagram. Your feedback is so helpful! Also, don’t forget to subscribe to my newsletter to be sure not to miss my latest recipes!

The Mug Cake topped with blueberries and oats.
Print
Blueberry Oatmeal Mug Cake
Prep Time
3 mins
Cook Time
2 mins
Total Time
5 mins
 

Blueberry Oatmeal Mug Cake, a single-serving microwave recipe that is ready in just 5 minutes! Full of healthy ingredients and sweet, juicy blueberries, like starting your day with dessert that is actually good for you.

Servings: 1 serving
Author: Helena
Ingredients
  • ½ very ripe large banana, mashed
  • ½ cups quick cooking oats
  • ¼ cups milk of your choice, I used almond milk
  • 1 egg
  • ½  teaspoon baking powder
  • ½ teaspoon vanilla or cinnamon
  • pinch of salt
  • 1-2 teaspoon honey or maple syrup, optional
  • ⅓ cup blueberries, fresh or frozen. and more for serving
Instructions
  1. To a large microwave safe mug, add the banana and mash well.

  2. Add the oats, milk, egg, vanilla, baking powder, salt and honey or maple syrup (if using sweetener)

    Stir well until everything is incorporated. Gently fold in the fresh or frozen blueberries.

  3. Cook on hight heat in the microwave for 2-3 minutes or until set. Top with more blueberries, yoghurt and some maple syrup if desired.

More Overnight oats and oatmeal

  • The baked oats in the baking dish cut into pieces.
    Strawberry banana baked oatmeal
  • The overnight oats in 2 glasses topped with fresh strawberries and chocolate chips.
    Chocolate strawberry overnight oats
  • The overnight oats in 2 glasses topped with banana slices and fresh blueberries.
    Blueberry banana overnight oats
  • A pice of the baked oats on a plate topped with yoghurt and sliced strawberries.
    Chocolate baked oatmeal

Reader Interactions

Comments

  1. Gail

    June 14, 2025 at 2:58 pm

    Your blueberry mug cake is so good. I used the flax egg and tablespoon of collagen powder with extra milk . I also used my homemade pancake syrup instead of honey. I will be making this more often.

    Reply

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Hi, I'm Helena!

Welcome to my blog, The Delicious Plate!

Here you’ll find some of my favourite recipes that your family will love! Cooking and baking is my passion so please follow along and share what I create!

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