In a small mixing bowl combine the whisked egg, peanut butter and sugar. Using a fork, mix the ingredients to fully combine.
Stir in the chocolate chips.
Spoon the batter into a 8-ounce (volume/liquid) mug or larger.
Place in the microwave and cook on high for 1 minute. Allow to cool slightly before eating. Note: the mug will be very hot, take care when handling it.