Mix Shakeology, baking powder, sea salt, cocoa powder, egg white, honey and milk in a bowl to form a batter.
Spray a ceramic mug (microwaveable) with cooking spray.
Drop half the batter into the mug followed by 1 teaspoon of peanut butter. Then add in the remaining batter to the mug.
Microwave the mug of batter for 1 minute 40 seconds. Then continue to cook for 10-second increments until desired consistency.
Slip the cake out of the mug onto a plate and drizzle with the remaining 1/2 teaspoon of peanut butter and be prepared to be addicted!