Yellow Angel Food Cake
["1 c. egg yolks (scant)", "1/2 c. boiling water", "1 c. sugar, sifted", "1 1/2 c. cake flour, sifted 4 times", "1/2 tsp. vanilla", "1/2 tsp. lemon extract", "2 tsp. baking powder"]
["Beat egg yolks and hot water and salt until stiff with an electric beater.", "Beat egg white pouring water so they won't cook. Add sugar slowly and 1/2 teaspoon vanilla and 1/2 teaspoon lemon extract.", "Add flour slowly.", "Continue beating; add baking powder last.", "Bake as an angel food.", "Slow for 1 hour.", "Don't make the pan over half full or it will run over."]
["egg yolks", "boiling water", "sugar", "cake flour", "vanilla", "lemon extract", "baking powder"]