Step 1

Preheat oven to 375°F (190°C). Line a 12-count muffin pan with muffin liners and set aside.

Step 2

In a large mixing bowl, whisk together the all-purpose flour, baking soda, ground cinnamon, and salt until well combined. Set aside.

Step 3

In a separate mixing bowl, whisk together the melted butter, brown sugar, egg, vanilla extract, and mashed banana until fully combined.

Step 4

Add the dry ingredients to the wet ingredients and mix together until just combined, making sure not to over mix the batter.

Step 5

Evenly distribute the batter between all 12 liners in the muffin pan.

Step 6

Bake at 375°F (190°C) for 16-20 minutes or until a toothpick inserted into the center of the muffins comes out clean. Remove from the oven and cool for 5 minutes in the pan, then carefully remove the muffins from the pan, and place them on a wire rack to cool completely.