Try one of our shaped icebox-cookie variations: Almond-Cherry Coins; Apricot-Pistachio Triangles; Almond and Candied Orange Zest Bars; White Chocolate, Hazelnut, and Cherry Triangles; Papaya, Macadamia, and Coconut Triangles; Cranberry-Orange Coins; Chocolate, Walnut, and Cranberry Coins; Candied-Fruit Squares; Almond and Ginger Bars.
Once the flour is incorporated according to dough recipe, beat in the desired mix-in. Divide dough into 2 pieces. Shape each into a 10-inch log (or a 10-inch-long triangular, rectangular, or square-shaped log). Coat each in ground nuts or sanding sugar, if using. Wrap in parchment. Refrigerate until very firm, about 2 hours.
Slice dough crosswise slightly thicker than 1/8 inch. Reshape if needed. Bake at 350 degrees on parchment-lined baking sheets until firm, 12 to 14 minutes.