Step 1

Preheat oven to 375 degrees. Spray or line a muffin tin.

Step 2

Add the bananas, brown sugar, and sugar to a mixing bowl and beat on medium speed until well combined.

Step 3

Beat in the egg, butter, and vanilla until just combined.

Step 4

Add the flour, baking powder, baking soda, cinnamon, and salt to a small bowl and stir to combine.

Step 5

Add the flour mixture to the wet mixture, stirring until just combine. Do not overmix.

Step 6

Stir in the walnuts.

Step 7

Spoon the mixture into the muffin tin 2/3 of the way full.

Step 8

Bake for 18 minutes or until a tester comes out clean.