1/2 c. butter
1 c. sugar
1 whole egg
1 egg yolk
1 3/4 c. sifted flour
1/4 tsp. salt
2 tsp. baking powder

Cream sugar and butter. Add whole egg and yolk which have been beaten together. Sift in dry ingredients. Chill. Roll very thin. Cut in desired shapes. Spread egg white over surface of cookie. Add cinnamon and sugar or other topping. Bake at 350 degrees for 8-10 minutes of lightly greased cookie sheet.

I roll mine between 2 sheets of waxed paper. Be sure to chill dough for several hours or overnight.