Banana mug cake

Name: Banana mug cake
Prep time: 60 s
Cook time: 120 s
Total time: 180 s
Yield: 1
Ingredients: 1 banana; 1/2 tsp expresso powder; 1 eggs; 1 tsp milk; 3 tbsp flour; 1/2 tsp baking powder; 1/4 tsp salt; 1 tbsp flour; 1 tbsp pecan nuts; 1 tbsp chocolate chips