Preheat oven to 350 degrees F. Line 12 muffin cups with cupcake liners.
Whisk flour, baking powder, salt, and cinnamon together. Set aside.
Beat sugar and butter together in stand mixer until creamy, about 3-4 minutes.
Add eggs and banana to butter mixture. Beat until combined. Add maple syrup and beat until combined.
Fold in flour mixture, one cup at a time. Pour into lined muffin pan, about 2/3 the way up.
Cook for 28-32 minutes, until fully cooked and toothpick is clean. Remove from pan and set on cooling rack.
Once cool, dip top of muffin in warm glaze then set back on cooling rack. Enjoy immediately or within 3-4 days.