Sift flour once, measure. Add cornstarch and sift again. Cream butter with vanilla.
Add powdered sugar and cream together until light and fluffy. Add flour mixture and mix until smooth. Chill dough.
Drop from tsp or form into small balls. Bake in preheated 350° F oven for 10 to 15 minutes. Cool.
Mix cream cheese, powdered sugar and vanilla. Add food coloring to tint. Frost cookies with tinted cream cheese frosting.
Servings: