Step 1 of 8
Preheat oven to 350°F (175°C). Grease a 9x5 inch loaf pan.
Step 2 of 8
In a large bowl, mix melted butter with mashed bananas.
Step 3 of 8
Stir in sugar, beaten egg, and vanilla extract.
Step 4 of 8
Sprinkle baking soda and salt over mixture and stir to combine.
Step 5 of 8
Add flour and cinnamon, mixing just until incorporated. Don't overmix!
Step 6 of 8
Pour batter into prepared loaf pan.
Step 7 of 8
Bake for 60 minutes, or until a toothpick inserted in center comes out clean.
Step 8 of 8
Cool in pan for 10 minutes, then turn out onto wire rack to cool completely.