Mom'S Filled Cookies
["1 c. sugar", "1 egg", "3 1/2 c. flour", "1 tsp. soda", "1/2 c. shortening", "1/2 c. milk", "2 tsp. cream of tartar", "1 tsp. vanilla"]
["Mix in order given; roll thin.", "Put one cookie on ungreased sheet.", "Put about 1 teaspoon filling.", "Place another cookie on top and pinch together.", "Prick holes with a fork on top of filling. Bake at 350\u00b0 for about 15 minutes or until brown around edges."]
["sugar", "egg", "flour", "soda", "shortening", "milk", "cream of tartar", "vanilla"]