1 ½cups(350 g) mashed over ripe bananas, 3 small bananas
½cup(120 ml) buttermilk, room temperature
Frosting
1cup(225 g) creamy no-stir peanut butter
½cup(113 g) unsalted butter, room temperature
2cups(240 g) powdered sugar, sifted
1teaspoonvanilla extract
2-4Tablespoonsmilk
Optional garnish either fresh banana slices or dried banana chips
Instructions
Preheat oven to 350℉. Line a standard muffin tin with paper liners. Set aside.
In a large bowl, whisk together flour, baking soda, baking powder, salt and cinnamon. Set aside
In the bowl of a stand mixer, beat butter, sugar and brown sugar on medium-high speed until light and creamy, about 2 minutes. Add eggs and vanilla, then mix until combined. Mix in the mashed bananas (it’s okay if the batter looks slightly curdled here).
Alternate adding the flour mixture and buttermilk to the batter. Begin and end with the flour mixture. Use a rubber spatula to scrape down the bottom and sides of the bowl as needed.
Scoop batter into prepared muffin tin filling each cup about three-quarters full. Bake at 350℉ for 18 to 20 minutes or until a toothpick inserted in the center comes out clean or with a few moist crumbs. Let cupcakes cool in the pan for 5 minutes, then transfer to a wire rack to cool completely.
For the frosting, use an electric mixer to beat peanut butter and butter until smooth. Add confectioners’ sugar and mix until well combined. Add vanilla and 2 Tablespoons milk, then mix until incorporated. For a thinner frosting, add more milk, 1 Tablespoon at a time, until desired consistency is reached.
Transfer frosting to a piping bag fitted with the desired tip. Frost cooled cupcakes and serve. If the cupcakes are being eaten immediately, garnish with a slice of banana. If they are being eaten within a few hours, garnish with dried banana chips.
Notes
Store frosted cupcakes in an airtight container in the refrigerator for up to 3 days. Freeze for up to 3 months. Wrap each cupcake tightly in plastic wrap, then place them in a freezer-safe container.