Step 1

Preheat your oven to 350 F.

Step 2

Spray your muffin pan with nonstick spray and set aside.

Step 3

Mix flour, baking soda, baking powder and salt in bowl.

Step 4

Mix bananas, sugar, butter, and egg until smooth.

Step 5

Add in flour mixture, continuing to stir until everything is combined.

Step 6

Spoon this into muffin pan evenly.

Step 7

Combine flour, cinnamon and brown sugar.

Step 8

Cut in your butter until it's crumbly.

Step 9

Add to the top of your muffins evenly.

Step 10

Bake for 10-13 minutes, until the sides of your muffins are slightly golden brown.