1 Preheat Oven To 450 F. Prepare A Floured Surface For Shaping The Dough And Have An Ungreased Baking Sheet Ready (Lined With Silpat Sheets If You Have Them). 2 Whisk Together Flour, Sugar And Salt In A Medium-Sized Bowl. Using A Fork Or A Pastry Blender Cut In The Shortening And Butter. Work Quickly, You Don