Microwave Banana Cake in a Bowl

Ingredients (8)

• + 6 tablespoons whole wheat flour add to pantry
• + 4 ½ tablespoons white sugar add to pantry
• + ⅛ teaspoon baking powder add to pantry
• + ½ banana, mashed add to pantry
• + 3 tablespoons milk add to pantry
• + 3 tablespoons vegetable oil add to pantry
• + 1 ½ teaspoons vanilla extract add to pantry
• ✓ 2 tablespoons chocolate-hazelnut spread (such as Nutella®), or to taste