Mix oat flour, cocoa powder and baking powder in a microwave-safe mug or ramekin.
Add Greek yogurt, egg and maple syrup. Stir until smooth.
Push the dark chocolate and peanut butter into the center of the batter.
Cover the center completely with batter.
Microwave for 60–75 seconds.
Let it rest for 1 minute.
Cut right into the middle and enjoy that molten chocolate center while it’s warm.
