Preheat oven to 325.
Grease and lightly flour preferred baking dish. (I use either a 9x5 Loaf pan, or three 4x2x2 Loaf pans, or even small bundt or twist pans if I want a cute design)
Mix flour, baking powder, baking soda, and salt in a bowl.
In another bowl, stir bananas, milk, and cinnamon.
In a stand mixer (or by hand), beat butter and sugar together until light and fluffy. Add eggs to butter mixture one at a time until fully incorporated.
Stir banana mixture into butter mixture, then flour mixture a little at a time.
Once blended, fold in chocolate chips.
Pour into prepared pan(s) and bake for 70 minutes.
If using the smaller loaf pans bake for 50-60 minutes, check with toothpick.
If using small bundt pans or twist pans, bake for 40 minutes.
Cool in pan for 5 minutes then on wire rack for 10.