Halfway Cookies
["3/4 c. butter or oleo", "1/2 c. white sugar", "1/2 c. brown sugar", "2 egg yolks, beaten", "1 Tbsp. water", "2 c. flour", "1 tsp. salt", "1 tsp. baking powder", "1 tsp. vanilla", "1/4 tsp. soda", "chocolate chips"]
["Cream the butter, sugars, egg yolks and water.", "Add flour, soda, baking powder, salt and vanilla.", "Put on greased cookie sheet and pat out thin.", "Sprinkle with chocolate chips.", "Beat 2 egg whites until stiff; add 1 cup brown sugar.", "Spread over cookie dough.", "Bake at 350\u00b0 for 20 minutes."]
["butter", "white sugar", "brown sugar", "egg yolks", "water", "flour", "salt", "baking powder", "vanilla", "soda", "chocolate chips"]