Mix the dry ingredients: In a microwave-safe mug, combine the chocolate protein powder, cocoa powder, baking powder, and coconut flour.
Add the wet ingredients: Crack the egg into the mug, then add the almond milk, sweetener, and vanilla extract. Mix well until everything is fully combined. If the batter seems too thick, add a tiny bit more milk.
Add chocolate chips (optional)
Microwave: Cook in the microwave for 1 minute to 1 minute and 30 seconds depending on your microwave's strength. The cake should be set on top but still slightly gooey in the middle.
Enjoy: Let it cool slightly before digging in. You can eat it straight out of the mug or invert it onto a plate.
