Preheat the oven to 350 degrees. Grease a 14-inch pizza pan or round baking stone, or line with parchment. Roll the chilled dough out onto it, leaving some space around the edge. Bake for 12 minutes. Try not to cook the sugar cookie all of the way to done so the cookie is a little soft.
Spread frosting over the cooled cookie crust and chill again to firm up the frosting.