Step 1

In a large coffee mug, mix all the dry ingredients together until uniform.

Step 2

Add butter and water stir until it forms a smooth batter.

Step 3

Stir in any optional ingredients to customize your mug cake.

Step 4

Microwave for 1 to 2 minutes until it tests done. The top of the cake should be slightly wet in the center and spring back when gently pressed.

Step 5

Let cool slightly. If desired, sprinkle on optional toppings. Enjoy!