Step 1: Place all the ingredients, except for the chocolate chips, into a large mug.
Step 2: Then stir the ingredients well until you have a smooth batter.
Step 3: Stir in half of the chocolate chips. Put the mug in the microwave and heat it on high heat for 70-80 seconds, until the top is firm and the cake is cooked through.
Step 4: Remove the mug from the microwave and top the cake with the remaining chocolate chips.