Single-Serving Banana Cake Ready in Less than 5 Minutes!

Name: Single-Serving Banana Cake Ready in Less than 5 Minutes!
Prep time: 3 min
Cook time: 1 min
Total time: 4 min
Cuisine: American
Ingredients: 3 Tbsp of flour (24g); 2 tsp of sugar (10g); 1 tsp of oil (5g); Pinch of salt; 1/4 tsp of baking powder (1g); 1/4 tsp of cinnamon (1g); 1/2 ripe banana; 1 to 2 Tbsp of chocolate chips (optional); 1 to 2 Tbsp of chopped walnuts or pecans (optional)