Heat oven to 375 degrees. In medium bowl, combine flour, cake flour, baking soda and baking powder; set aside.

In large mixer bowl, combine sugar, brown sugar and butter. Beat at medium speed, scraping bowl often, until creamy, 2 to 3 minutes. Add eggs and vanilla. Continue beating; scrapeing bowl often until well mixed (one minute). Reduce speed to low, continue beating, gradually adding flour mixture until well mixed, 2 to 3 minutes. By hand, stir in chocolate chips. Drop dough by 1/4 cupfuls 2 inches apart onto cookie sheets. Bake in preheated oven for 10 to 14 minutes. Remove from cookie sheets. Makes 26 Jumbo cookies

cake flour, but cookies will be flat and less chewy.

Cook's Tip: For 2 1/2 inch cookies, drop by rounded tablespoons 2 inches apart onto cookie sheets. Bake for 10 to 12 minutes until light golden brown. Makes 4 dozen cookies.