Firstly, melt the butter in the microwave. (Roughly 10 seconds)
Beat in the egg and banana.
Add the dry ingredients, milk, and mix until combined.
Cook in the microwave for 1 minute and 30 seconds. Cook further, if not fully cooked.
Serve & Enjoy
Recipe Tips
If you like your mug cakes slightly gooey in the middle, then reduce the cooking time slightly.
For the best results use an overripe banana.
Add a drop of vanilla extract for a bit of extra flavor.
You can make this banana cake gluten-free by replacing the flour and baking powder with gluten-free variants.
Mug cakes can make a mess in your microwave so keep an eye on it. Placing a plate under the mug will make cleaning up easier if it does end up overflowing.
Use a skewer to ensure that the middle is fully cooked. The skewer should come out clean. This step is essential if you can’t eat any undercooked egg.