Step 1

In a microwave safe mug, whisk together protein powder and baking powder. Stir in cocoa powder and sweetener, if using.

Step 2

Stir in egg until mixture is smooth.

Step 3

Add water as needed to thin out consistency and stir to combine.

Step 4

Microwave on high for 30-40 seconds, adding time in 5-second increments until top of cake is mostly dry.

Step 5

Add toppings and enjoy warm.