Ingredients
Method
- Preheat oven to 350°F. Line a 4-inch round cupcake pan or use a ramekin.
- Mix banana, milk, oil, and vanilla in a small bowl.
- Stir in flour, sugar, baking powder, and salt until just combined.
- Pour batter into pan about two-thirds full.
- Bake 12–16 minutes until a toothpick comes out clean. Cool completely.
- Whip peanut butter, powdered sugar, and milk until spreadable but not runny.
- Frost with a small offset spatula or spoon. Keep frosting thin to avoid heavy mess.