PREHEAT oven to 350° F.
SIFT flour once, measure 2 cups, add baking powder and sift again.
CREAM butter, add sugar gradually, and cream well. Add egg yolks, one at a time. Add vanilla; then flour. Mix well.
ON cookie sheet place dough between 2 sheets of wax paper and roll to ¼ inch thick. Chill in refrigerator for 1 -2 hours.
TAKE cookie sheet from refrigerator and remove top sheet of waxed paper.
TURN dough onto a slightly floured surface and remove second sheet of waxed paper. Immediately cut into shapes using 2” cookie cutters.
BAKE on lightly greased cookie sheet for 8 -10 minutes.