3 Ingredient Chocolate Banana Mug Cake (Gluten Free)

0 Mash the banana. In a microwave-safe mug, add 1/2 the banana & mash it gently in the bottom of the mug with a fork being careful not to completely puree it. It is okay to still have a few small chunks of banana left.
1 Add the remaining ingredients. Add the chocolate cake mix and milk to the mug, mixing gently with a fork until the cake batter thickens. If you're adding chocolate chips, you can do so now.
2 Cook the mug cake. Place the mug in the microwave & cook for 60 seconds. Note that cooking time may vary as different microwaves have different levels of power. If your cake has not baked in 60 seconds, continue microwaving it in increments of 5 seconds until the cake bakes fully, being careful not to dry it out by microwaving it for too long. Top with extra chocolate chips & banana slices if desired.