Prep: Heat oven to 375˚ F.

In a medium bowl combine flour, baking powder, and baking soda. Stir and set aside.

In a large bowl beat together butter, sugar, and brown sugar. Beat at medium speed until creamy—about 3 minutes. Add eggs and vanilla. Continue beating, scraping the bowl often, until well mixed.

Reduce the speed to low and incorporate the flour mixture until just mixed. Stir in the chocolate chips. The dough will be thick.

Drop by ¼ cups of batter. Keep 2 inches apart onto an un-greased cookie sheet. Bake for 14-16 minutes, turning the pan halfway through baking. Do not over bake. Let stand for 2 minutes and then remove to cooling rack.