Blueberry mug cake

Blueberry mug cake

10 min
A tasty blueberry mug cake is incredibly easy to make and takes just a few minutes to cook in the microwave. As such, it is perfect for busy days or mornings when you are in the mood for something sweet but do not have much time to spend in the kitchen. Made with rolled oats, banana, shredded coconut, cinnamon, and, of course, fresh blueberries, this blueberry mug cake makes for a moist and delicious snack or breakfast bursting with irresistible flavours.


  • Mix rolled oats, banana, egg, shredded coconut, and cinnamon until the batter is smooth. Fold in the blueberries.
  • Grease a mug with butter and rapeseed oil and pour in the cake batter. 
  • Cook for 1½-2 minutes at medium-high heat in the microwave.
  • Serve the warm blueberry mug cake with quark.

When making this blueberry mug cake, it is important to choose a microwave-safe mug. Leave your grandmother's decorative porcelain on its shelf and choose one that can handle the microwave. In a pinch, blueberry mug cakes can, of course, also be cooked in glasses, jars, and ceramic ramekins that are microwave safe.


Secondly, it is a good idea to opt for a slightly big mug to avoid overfilling it since this can result in the blueberry mug cake overflowing as it rises in the microwave which can make a bit of a mess. As such, aim to only fill it halfway.

Questions about mug cakes

Because blueberry mug cakes are incredibly quick and easy to prepare, they are perfect as quick snacks or breakfast bites on busy days. To learn more about the delicious treat, read our answers to the most frequently asked questions below.

What is a mug cake?
A mug cake is, as the name would suggest, a small, single-serving cake that is cooked in a mug. Similar to muffins in respect to looks, mug cakes may be prepared in just a few minutes as they are cooked in a microwave. These quick and easy cakes may be flavoured in a myriad of ways. Popular choices include flavours like chocolate, vanilla, red velvet, coffee, peanut butter, and citrus. It is also possible to add fresh berries, which is why blueberry mug cakes are a favourite among many. To ensure a nice, moist texture, they are often made with ingredients like eggs and bananas.
How to make a mug cake?
A blueberry mug cake is a fun and easy way to make a single-serving cake. Prepare the batter by mixing rolled oats, mashed banana, beaten egg, shredded coconut, and cinnamon until the mixture is smooth before gently folding in the blueberries. Pour the batter into your mug of choice after greasing it. Cook the quick blueberry cake in the microwave for a few minutes and enjoy it while it is warm with a serving of fresh and creamy quark on top.
How long do you microwave a mug cake?
Mug cakes take about 1½-2 minutes to cook in the microwave. The best way to tell if it is properly cooked is to insert a toothpick into the middle of it. If the toothpick has wet batter or gummy crumbs on it upon removal, the blueberry mug cake is not done yet. Finish cooking it in short 10-second bursts to avoid drying it out.
Can you freeze a mug cake?
Freezing blueberry mug cakes is possible. It is important to let it cool completely before transferring it to the freezer. Otherwise, the mug may crack. After allowing the cake to cool, wrap it in cling film and pop it into the freezer. It should keep for up to 2 months in the freezer. Let it thaw in the fridge overnight and reheat it for 15-20 seconds in the microwave. The cake may be less moist upon being thawed and reheated, so we recommend preparing your blueberry mug cakes fresh rather than in advance.

Nutritional values

Nutritional value, per

Fibre 3.4 gram fibers
Protein 7.7 %
Carbohydrates 17.6 %
Fat 15.5 gram


Rolled oats
1 dl
Banana, mashed
Egg, beaten
Shredded coconuts
1 tbsp
Ground cinnamon
1 tsp
½ dl
Butter and rapeseed oil
½ tbsp
Quark 0.3%
50 ml

Moist cinnamon and blueberry mug cake

A blueberry mug cake is a great treat to make for others. In under 5 minutes, you can make it as a sweet surprise. Serve it in a friend or family member's favourite mug to bring a smile to their face.

Though it is quick and easy to make, a blueberry mug cake is deliciously rich. The egg and banana make it so soft and sweet and ensure its moist texture. Sweet and earthy cinnamon gives the sweet-tart berry snack some lovely warm and woody undertones that make its generally sweet flavour profile more complex.

Finish with a mild quark on top

The warm, sweet blueberry mug cake is slightly dense in texture. As such, serving it with airy, ice-cold quark makes for a lovely contrast. The fresh and mild flavour of the yoghurt-like product is similar to sour cream. This makes it ideal for brightening the sweet and rich blueberry mug cake and introducing just a hint of acidity.

Easy muffin-sized cake for snacks or quick breakfasts

A single-serving cake like a blueberry mug cake is perfect for indulging a craving without having to bake an entire cake. Because of its small size, it makes for a great snack, but it is also substantial enough to be suitable as a quick, sweet breakfast if you want something that is both tasty and easy.

Are you looking for more snacks like this that make for tasty treats? Have a look at our recipes for baked oats, banana muffins, and bacon and egg muffins too.

Flavoured with blueberries, oatmeal, and coconut

Our blueberry muffin mug cake has plenty of wonderful flavours as well as textures. The shredded coconut adds a wonderful sweetness, nutty undertones, as well as a nice chewy texture.

Similarly, the rolled oats, too, give this moist cake a bit of a bite. They also bring some slightly earthy notes to the flavour profile of the sweet blueberry mug cake. The colourful blueberries themselves provide sweetness as well as small pops of freshness that brighten the rich and somewhat dense cake.

Make it your own

Experimenting with our blueberry mug cake recipe is incredibly easy. You could, for instance, add more crunchiness by using chopped almonds, walnuts, and hazelnuts or give it more warming flavours by using a bit of cardamom and nutmeg in addition to cinnamon.

If you want to add more tang, the flavour of sharp lemon pairs wonderfully with sweet blueberries. Try using a bit of freshly squeezed lemon juice and/or lemon zest to introduce a fresh, zesty flavour into your blueberry mug cake.

Another option is to add even more fresh berries to your blueberry mug cakes. Sweet-tart blueberries pair well with other sweet-tart berries like raspberries, tangy ones like cranberries and gooseberries, as well as sweet ones like strawberries. Experiment with different berries, depending on which ones you have on hand and discover your favourite flavour combination. Just make sure not to add too many in total to not make the cake soggy.