In a large mug mix together egg white, water, Chocolate SunButter, and maple syrup until uniform consistency forms.
Add oat flour, cocoa powder and baking powder and mix until combined and no lumps remain. Sprinkle chocolate chips on top.
Microwave for 1 minute 30 seconds. (If your mug is smaller than 10 ounces you may wish to microwave the mug with a plate underneath in case of spillage.) Enjoy with an extra drizzle of Chocolate SunButter on top!