Place the rack in the middle of the oven. Preheat oven to 400℉ and line a muffin pan with paper liners. Get two mixing bowls, one bigger than the other.
Add the bananas to the larger mixing bowl. Take a fork and mash the bananas to the consistency you want.
3 bananas
Add olive oil, milk, egg, and vanilla extract. Whisk together until combined.
1/3 cup olive oil, 1/4 cup almond milk, 1 large egg, 1 teaspoon vanilla extract
In the other bowl, add the dry ingredients - flour, brown sugar, white sugar, baking powder, baking soda, cinnamon, and salt.
1 1/2 cups flour, 1/2 cup brown sugar, 1/4 cup white granular sugar, 1 teaspoon baking powder, 1/2 teaspoon baking soda, 1/2 teaspoon cinnamon, 1/2 teaspoon salt
Use a clean whisk to mix the dry ingredients until combined.
Add the dry ingredients to the wet ingredients.
Take a rubber spatula and fold the ingredients together until combined. Be careful not to overmix the batter.
Spoon the batter into the muffin pan (paper liners) about ¾ the way up.
Lower the oven temperature to 350℉ and place the muffin pan in the oven. Bake for 18 - 20 minutes. (Depending on your oven - my muffins take 20 minutes). Test the doneness with a cake tester or a toothpick. It should come out clean.
Let the muffins cool in the pan for 5 minutes before removing them and placing them on a wire rack for cooling.
Slather with butter and eat, smile, and enjoy.