01 -
Get your oven warming up to 350°F (177°C). Line a 12-cup muffin tin with paper liners.
02 -
In a large bowl, whisk together your flour, brown sugar, baking powder, baking soda, and salt until well combined.
03 -
In another bowl, mix up your melted butter, mashed bananas, egg, and vanilla until everything's nicely blended.
04 -
Pour your wet ingredients into the dry ingredients and stir just until you don't see any flour streaks. Fold in those chocolate chips.
05 -
Fill each muffin cup about 3/4 full with batter. Pop them in the oven for 20-25 minutes, or until a toothpick comes out clean when poked in the center. Let them cool on a wire rack.