Tea Cookies
["1/2 c. sugar", "1/4 c. butter", "1/2 c. flour", "1 egg yolk", "1/4 tsp. vanilla", "1/4 tsp. baking powder", "1 tsp. water"]
["Cream the butter and sugar.", "Add the egg yolk, water and vanilla.", "Beat well.", "Add the dry ingredients.", "Roll, using more flour if necessary.", "Cut and brush with egg white.", "Bake in a moderate oven about 10 minutes.", "Quite rich and crisp."]
["sugar", "butter", "flour", "egg yolk", "vanilla", "baking powder", "water"]