Using an electric mixer on medium speed, beat the butter and sugar until light and fluffy. Add the eggs, one at a time, mixing well after each addition. Mix in the vanilla.

Reduce mixer speed to low. Gradually add the flour mixture, mixing just until combined. Stir in the chocolate chips.

Drop the dough by half-tablespoon portions onto the prepared pans. Bake 7-9 minutes, or until the cookies are lightly browned. Keep the remaining dough refrigerated between batches.

Cool the cookies on the pan on a wire rack for 5 minutes. Then transfer the cookies to a wire rack to cool completely.