Mom's chocolate chip cookies

1 1/2 cups butter (NOT margarine!!!)
1 1/2 cups sugar
1 1/2 cups brown sugar
2 eggs
2 tsp. vanilla
2 tsp. baking powder
1 tsp. salt
5 cups flour
2 cups chocolate chips

Preheat oven to 350. Cream together butter and sugars, mix in eggs and vanilla. Stir in dry ingredients, add in chocolate chips. Roll into 1 inch balls and bake at 350 for approx. 10 minutes. Do not overbake!!! Makes 4-5 dozen.