- 1 banana, mashed
- 2 tablespoons all-purpose flour
- 2 tablespoons cocoa powder
- 2 tablespoons honey
- 1 egg
- 1 1/2 teaspoons milk
- 1 teaspoon baking soda
- Mix banana, flour, cocoa powder, honey, egg, milk, and baking soda together in a large microwave-safe mug.
- Heat in microwave on High until cake rises and is done in the middle, about 2 minutes.