Shortbread Cookies Everyone will be asking you for this classic holiday cookie recipe . INGREDIENTS 2 cups flour Pinch salt 1 cup unsalted butter room temperature 1/2 cup icing sugar, sifted PREPARATION: Preheat oven to 350 degrees F. Line 2 baking sheets with parchment paper. Combine flour and salt. Set aside. Cream the butter and icing sugar together until light and fluffy. Stir flour mixture in butter mixture, just until incorporated, do not over work. Cover and let rest in fridge, for 1 hour...