Preheat oven to 350 degrees.

In a large mixing bowl, combine the dry ingredients with a fork or wire whisk.

In a seperate bowl, use a hand mixer to cream the butter and brown sugar together.

Whisk the eggs, half and half, and vanilla extrack in a large measuing cup.

Use the hand mixer to combine the butter mixture with the wet ingredients.

Add the mixture to the dry ingredients and mix until just combined.

Fold in the mashed bananas.

Divide the batter evenly between a 12-cup muffin pan. A cookie scoop works best for this.

Bake for 18-20 minutes until a toothpick comes out clean and the tops are golden.

Let cool to the touch before removing from the pan.