Preheat the oven to 350ºF. Either use a silicone muffin tin, silicone muffin liners OR grease a muffin pan with butter or coconut oil. The silicone options are best to avoid sticking, but a well-greased tin should be fine!
In a large mixing bowl, mash the banana until as smooth as possible.
Stir in the yogurt, eggs, and coconut sugar until well combined.
Add the almond flour, protein powder, baking powder, soda, and salt and stir to form a batter.
Fold in the all purpose flour, being sure to not overmix which will result in a gummy muffin. Fold in the chocolate chips if using.
Fill each muffin cup 2/3 full then bake for 24 - 26 minutes.
Allow the muffins to cool in the pan for at least 5 minutes, then transfer to a wire rack and cool completely.
Notes
Tip: want to add even more protein? Stir in 3 tablespoons of hemp seeds when you add the chocolate chips.