01 - 
                Preheat your oven to 350°F (175°C). Line a muffin tin with wrappers or lightly grease it.
              
              
              
                02 - 
                In a large bowl, mash the bananas until mostly smooth, leaving a few chunks. Whisk in the eggs, white sugar, and sour cream until just combined.
              
              
              
                03 - 
                Add oat flour, baking powder, protein powder (if using), baking soda, and salt to the wet mixture. Stir until a smooth batter forms.
              
              
              
                04 - 
                Fold in the chocolate chips, reserving some for topping if desired.
              
              
              
                05 - 
                Scoop the batter into the prepared muffin tin, filling each cup about ¾ full. Add a few extra chocolate chips on top of each muffin, if desired.
              
              
              
                06 - 
                Bake mini muffins for 10 minutes, or standard muffins for 18–20 minutes, until a toothpick inserted into the center comes out clean.
              
              
              
                07 - 
                Allow the muffins to cool in the tin for 10 minutes, then transfer to a wire rack to cool completely. Enjoy!