1 cup (1/2 pound) butter, softened
1/2 cup confectioner's sugar
2 teaspoons oil
1/2 teaspoon salt
1 3/4 cups (8 ounces by weight) all-purpose flour
Preheat oven to 350 degrees.
Cream butter and sugar in an electric mixer. Add the remaining ingredients and beat at medium speed for 2 minutes.
Spoon the mixture into a pastry bag fitted with a star pastry tube.
Pipe the equivalent of a teaspoon onto cookie sheets. Bake 18 20 minutes.
Transfer cookies to racks. Cool. Store in an airtight container