A 5-ingredient, 208-calorie mug cookie recipe.
Mix the dry ingredients in a bowl before adding the banana.
Use the backside of a fork or rubber spatula to mash the banana while stirring everything together.
Keep working the cookie dough until you can press it into a disc at the bottom of the bowl.
Top with chocolate chips and microwave for 30-45 seconds. (It’s better to undercook than overcook.)
Let the cookie briefly cool before eating.