How to make a Chocolate and Mint mug cake
Lightly grease a large microwaveable mug.
Whisk together all the ingredients until combined.
Pour the mixture into the mug, leaving plenty of room for raising -the cake will nearly double in height in the microwave.
Microwave on high for 1½–3 minutes.
Decorate with mint leaves.
Microwave cooking times vary widely so the cake needs to be watched all the time as it cooks.
Depending on your microwave it could be ready in 60 seconds or it could take 3 minutes.