In a large saucepan, melt butter over medium heat without stirring until it becomes brown and nutty in aroma. Allow to cool.
⅓ cup butter
In a large bowl, whisk flour, baking soda, baking powder, salt and cinnamon together. Set aside.
1½ cups all purpose flour, 1 teaspoon baking soda, 1 teaspoon baking powder, ½ teaspoon salt, ½ teaspoon cinnamon
In a mixing bowl or stand mixer, combine bananas, sugar, egg, vanilla and cooled butter.
3 bananas, ¾ cup white granulated sugar, 1 egg, 1 tablespoon vanilla, ⅓ cup butter
Gradually incorporate dry mixture into wet until just moist.
Spoon mixture into muffin tin until ⅔ full.
TOPPING
Combine topping ingredients in a small bowl and sprinkle over muffins.
1 tablespoon butter, ⅓ cup brown sugar packed, ½ teaspoon cinnamon, 2 tablespoons all purpose flour
Bake 16 minutes or until it comes clean with a toothpick test.
Notes
Ripe bananas are a key ingredient to a moist and delicious banana muffin. No worries, though - if you have green bananas there are a few ways to speed up the process.
How to Ripen Bananas Quickly
Place them in a brown paper bag and wait 12 hours.
Microwave for 1 minute, check every 15 seconds after that.
Bake at 300 degrees for 15 minutes on a cookie sheet, add more time if needed.
Gas stations tend to have ripe bananas in a pinch.