1. In a mug, add 2 tbsp mashed banana, 4 tbsp whole wheat flour, 1/4 tsp baking powder, 1/8 tsp salt, 1 tbsp powdered sugar, 3 tbsp milk, 1 tbsp oil, 1/4 tsp vanilla essence. mix well using a fork. make a lump free batter.
2. Wipe the egdes. add chocolate chips on top and microwave for 1 minute.