Preheat your oven to 350 degrees F and add liners to 12 wells of a muffin tin or spray with non-stick spray. Set aside.
To a large bowl, add the mashed bananas, oil, and egg. Mix with a spoon.
1 1/2 cup bananas, 1/3 cup oil, 1 large egg
In another large bowl, add in the sugar, flour, cocoa powder, baking soda, and baking powder. Whisk together.
1 cup granulated white sugar, 1 1/2 cups all purpose flour, 1/4 cup unsweetened cocoa powder, 1 teaspoon baking soda, 1/4 teaspoon baking powder
Add the dry ingredients into the wet ingredients and stir well.
Stir in the mini chocolate chips.
1 cup mini chocolate chips
Scoop the batter evenly into the 12 muffin tins.
Sprinkle the top of each muffin with sugar.
turbinado sugar
Bake for 20 to 25 minutes - when a toothpick inserted into the center of a muffin comes out clean, they're done.
Notes
Vegetable oil, canola oil, melted coconut oil, avocado oil can be used. Applesauce can also be used in place of oil but it makes a slightly denser muffin.
To quickly ripen bananas, place them on a baking sheet and bake in a 350°F preheated oven for 10 minutes. Let cool slightly then they're ready to use.
Store leftovers covered at room temp for up to a week.