First, preheat your oven to 425F and add liners to your muffin tin.
In a large bowl, whisk together the dry ingredients until combined. Set aside.
1 ¼ cup gluten free 1-to-1 flour, ½ cup unflavored collagen peptides, 1 tsp cinnamon, 1 tsp baking powder, ½ tsp baking soda, ½ tsp kosher salt
In another large bowl, whisk together all of the wet ingredients until smooth. Then, add dry ingredients to the wet ingredients and stir with a spatula until some of the flour is still visible.
1 ¾ cup mashed spotty bananas, 2 large eggs, ½ cup coconut sugar, ⅓ cup refined coconut oil, ¼ cup full-fat plain greek yogurt or skyr, 1 tsp vanilla extract
Add in the chocolate chunks and continue stirring until no more flour is visible, but do not over-mix or your muffins will be dense! Allow the batter to rest for 15 minutes.
¾ cup dark chocolate chunks
Divide batter evenly between the 12 muffin cavities (or 10 if you prefer bigger, taller muffins). Top with a few extra chocolate chunks, if desired. Transfer to the oven and bake for 8 minutes. Then, reduce the oven temperature to 350F and continue baking for 10-12 more minutes, or until a toothpick comes out clean or with a few moist crumbs but no wet batter.
Allow the banana chocolate chunk muffins to cool down in the muffin tin for 5 minutes, before transferring them to a wire rack to finish cooling. Enjoy!