Gold Cake
["2 3/4 c. sifted Swans Down cake flour", "1/2 tsp. salt", "3/4 c. butter", "3/4 c. milk", "2 3/4 tsp. baking powder", "1/4 c. sugar", "1/2 tsp. lemon extract", "8 yolks (from eggs)"]
["Sift flour once; measure.", "Add baking powder and salt and sift together 3 times.", "Cream butter thoroughly.", "Add sugar gradually and cream together until light and fluffy.", "Beat egg yolks thoroughly until light colored and thick enough to fall from the beater in a heavy continuous stream.", "Add to creamed mixture and beat until smooth, almost waxy in appearance.", "Add flour alternately after each addition.", "When all flour is added, beat thoroughly again.", "Add lemon extract.", "Bake in 3 greased 9-inch layer pans in moderate oven at 375\u00b0 for about twenty minutes or until tops spring back.", "Cool.", "Frost with any icing you choose."]
["flour", "salt", "butter", "milk", "baking powder", "sugar", "lemon extract", "yolks"]