Preheat oven to 325°F and grease a 12 cup muffin tin.
In a small bowl, peel and mash bananas together well with fork. Mix in cinnamon and set aside.
In a medium bowl, cream together butter and sugar until light and fluffy. Add eggs one at a time, mixing well between each one. Mix in vanilla.
Add banana and cinnamon mixture to the butter, sugar, eggs, and vanilla mixture and combine well.
Combine your dry ingredients (Huel, flour, cocoa powder, baking powder, baking soda, and salt) in a separate medium bowl.
Add your dry ingredients to your wet mixture, and combine evenly. Fold in chocolate chips.
Divide mixture among 12 muffin tins and bake for 30 minutes or until toothpick comes out clean.
Remove from oven and let cool before serving.