Old Fashioned Sugar Cookies
["4 c. flour", "1 tsp. salt", "2 tsp. baking powder", "1 tsp. sour milk (add 1/4 to 1/2 tsp. vinegar to milk)", "1 c. shortening", "2 c. sugar", "2 eggs", "1 tsp. vanilla"]
["Sift together flour, salt and powder; add soda and milk. Cream shortening and sugar; add eggs and beat well.", "Alternate additions of milk mixture and flour; add vanilla.", "Chill.", "Roll out and cut out.", "Bake at 350\u00b0 to 400\u00b0 for 8 to 10 minutes on greased cookie sheet."]
["flour", "salt", "baking powder", "sour milk", "shortening", "sugar", "eggs", "vanilla"]