Banana Chocolate Chip Muffins

Banana Chocolate Chip Muffins (from here)

1/2 cup butter (I used Earth Balance)
2/3 cup sugar
1 cup mashed banana (about 2 medium)
1 large egg
1 tsp vanilla
1/8 to 1/4 tsp butter rum or coconut flavor (didn't have but would be good)
1/3 cup milk
1 1/2 tsp baking powder
1/2 tsp baking soda
1/2 tsp salt
1 cup all-purpose flour
1 cup whole wheat flour
3/4 cup chocolate chip
1 cup chopped walnuts (pre-toasted in a 350 oven for 8 mins) (didn't have)
1 cup cinnamon chips (didn't have but added a tsp of cinnamon instead)

Preheat the oven 350. Lightly grease 12 to 14 muffin cups.

Beat together the butter and sugar until smooth.

Beat in the mashed banana, then egg, flavorings, and milk.

Add baking powder, baking soda, salt, and flours. Stir until Smooth. Beat at higher speed until lumps disappear.

Stir in chocolate chips, walnuts, and cinnamon chips.

Heap batter into muffin cups. Sprinkle with course white sugar if desired (didn't but want to next time).

Bake muffins for 20-23 minutes (I did mini muffins for 10 mins).