In a microwave-safe mug, add cake mix, water and applesauce. Mix with a mini whisk until batter is smooth. If using chocolate chips, add and stir in 1 tbsp into the batter. Sprinkle remaining over top of the batter.
Cook in the microwave at full power for 1 minute. Allow cake to cool a few minutes before eating.
Notes
I tested this with Pillsbury and Betty Crocker cake mixes.
I know some people might not keep applesauce on hand,but I found that it really helped keep the cake super moist and also helped bind it together better. If you don't have applesauce on hand, you can use 2 tbsp water and 1/2 tbsp oil (instead of the water and applesauce amounts listed). The cake stays moist but the crumb is quite loose which is why I prefer the applesauce version.
The nutrition information provided are only estimates based on an online nutritional calculator. This is not a comprehensive list of all the nutrients in the recipe (i.e., does not include vitamins, cholesterol, etc). I am not a certified nutritionist. Please consult a nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.