Preheat the oven to 425℉. Line two 12-cup muffin pan with muffin liners (or just one pan at a time) Fill every other cup with a muffin liner, 6 liners per pan. This helps the bake and rise.
In a medium bowl, mix the flour, baking powder, baking soda, cinnamon, and salt. Set aside. Mash the three bananas on a plate using a potato masher or a fork.
2 cups All-purpose flour, 2 teaspoon Baking powder, ¼ teaspoon Baking soda, 1 teaspoon Ground cinnamon, ½ teaspoon Salt, 3 Ripe medium bananas
In a large mixing bowl using a mixer, beat the melted butter, brown sugar, and peanut butter on high speed for 2 minutes.
½ cup Unsalted butter, ½ cup Brown sugar, ½ cup Peanut butter
Add in the sour cream, vanilla, mashed banana, and eggs. Mix on medium until combined.
¼ cup Sour cream, 1 teaspoon Pure vanilla extract, 2 Large eggs
Pour in the dry ingredients and chocolate chips. Mix on low speed until combined.
1 cup Semi-sweet chocolate chips
Use a large cookie scoop to scoop the batter. It should be a heaping scoop into each liner. It should be full to the top with batter.
Sprinkle coarse sugar over the muffins. Add extra chocolate chips on top.
Coarse sugar in the raw
Bake for 8 minutes at 425℉. The, reduce the heat to 375℉ for another 6-8 minutes. Muffins are done baking when a toothpick inserted comes out clean.
Let the muffins sit in the hot pan for 10 minutes before transferring to a cooling rack to cool.