These soft no-roll sugar cookies deliver all the classic flavor of a traditional cutout cookie without the fuss of a rolling pin. A combination of butter and vegetable oil gives the dough a rich, melt-in-your-mouth texture that stays incredibly tender after baking. Cream of tartar adds a subtle tang to balance the sweetness of the dual-sugar base. Simply shape the chilled dough into balls, press them flat with a glass, and bake until the edges turn golden. They make an excellent addition to a holiday cookie tin or a simple weekend dessert spread.