Pastry: Mix confectioners sugar, flours, salt, and cinnamon. Cut in with fork or pastry blender until fine crumbs form. Pat into a well-oiled 9-x13-inch baking pan. Bake at 350 degrees for 20 minutes, then remove form oven.
Topping: Combine all ingredients and spread over warm crust. Bake for an additional 20-30 minutes or until golden brown and bubbly. Cool completely before cutting into 1 and 1/2 inch bars.