Step 1

Preheat the oven to 350 degrees F.

Step 2

Spray a loaf pan with nonstick spray.

Step 3

Melt the butter in a large bowl in the microwave, about 1 minute.

Step 4

Add the bananas to the melted butter and mash them with a fork.

Step 5

Add the eggs and the vanilla to the bowl and mash them into the banana mixture, stirring until no streaks of egg remain.

Step 6

In a second large bowl, whisk the flour, the sugar, the baking soda, the salt, and the cinnamon together.

Step 7

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

Step 8

Pour the batter into the prepared loaf pan.

Step 9

Bake until a toothpick inserted in the center of the bread comes out clean, about 45-55 minutes.

Step 10

Serve.