Cream together butter and sugar. Beat in eggs and sour cream. Mix in dry ingredients. Cover and refrigerate overnight.
Preheat oven to 425° F.
Roll out dough to a 1/4 to 3/8 inch thickness using a generous amount of flour. Cut out shapes and bake on an ungreased cookie sheet for 8 minutes. Cool on wire rack. Frost and decorate as desired.Makes 4 Source: