Banana Chocolate Chip Bread

I got this recipe from our friend,Meike and have been using this for the last 4 yrs almost.
Ingredients:
Butter-1/2 cup
Sugar-1 cup
Eggs-2
Vanilla-1 tsp
Ripe bananas-3
Milk-1/4 cup
Flour-1 1/2 cups
Baking powder-1 1/2 tsp
Baking soda-1/2 tsp
Salt-1/4 tsp
chocolate chips-1/2 cup
Procedure:
1.Preheat oven to 350 degree Fahrenheit.Grease loaf pan with baking spray.
2.Combine butter,sugar,eggs,vanilla essence in a large bowl.
3.In a separate bowl, mash bananas with milk.
4.Beat on low speed to blend into other ingredients.
5.Add baking powder,baking soda,salt,flour with the above mixture and beat till moist.
6.Use a spatula to stir in chocolate chips. Do not use blender for mixing chocolate chips.
7.Pour into the greased loaf pan and bake for 50-60 minutes until a toothpick inserted in the center comes out clean.
8. Wait for 10 minutes to cool and then remove from the loaf pan.