Preheat your oven to 350 degrees Fahrenheit.
Add the peeled bananas to a large bowl and use a fork or a potato masher to mash them until smooth.
Add the brown sugar, granulated sugar, vegetable oil, eggs, and vanilla to the bowl. Use an electric hand mixer to beat until smooth.
Add the gluten free flour, almond flour, baking powder, baking soda, salt, and cinnamon to the bowl. Use the electric hand mixer again to beat until smooth (do not overbeat or the muffins will get tough).
If desired, add the chocolate chips into the batter and hand mix until evenly dispersed.
Line a muffin pan with muffin liners. Fill each liner ¾ of the way full with the muffin batter. If desired, sprinkle 3-4 chocolate chips on the top of each muffin.
Bake for about 18-20 minutes in the oven or until a toothpick comes out clean. Let cool completely before enjoying.