1 cup butter, softened
1/2 cup confectioners' sugar
1/4 cup cornstarch
1 1/2 cups flour
Preheat the oven to 375° F.
Whip butter with an electric mixer until fluffy. Stir in the confectioners' sugar, cornstarch, and flour. Beat on low for one minute, then on high for 3 to 4 minutes. Drop cookies by spoonfuls, or in a decorators bag with a large star shaped tip, 2 inches apart on an ungreased cookie sheet.
Bake for 12 to 15 minutes in the preheated oven. Watch that the edges don't brown too much. Cool on pan and then move to wire racks.
These can also be drizzled, when cool, with a colorful glaze for the holidays.