1Cream together 1/2 cup butter, 1 cup sugar, blend in medium egg plus two egg yolks.
2Separately, sift together and add to mixture - salt, baking powder, already sifted flour. Blend then add vanilla.
3Chill, roll out dough and cut with cookie cutters on lightly greased cookie sheet in 400 degree oven for 8 to 10 minutes.
4For glaze: mix together the 3/4 cup sifted powdered sugar with 3 to 4 teaspoons water and brush on cookies while still warm.
Chill dough three hours or more, then form rolls and flace in freezer (rolls in shape of a rolling pin or tube and wrapped in wax paper). Remove from freezer and make slices 1/4 inches thick and place directly on cookie sheet for plain sugar cookies, bake for 8 to 10 minutes.