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["Cake: Preheat oven to 350u00b0; grease and flour an 8"" round cake pan.", "Beat the egg whites until stiff in a large bowl; in a small bowl beat the egg yolks until light; add to the whites and beat together; slowly add the sugar, beating for 5 minutes.", "Sift the flour, baking powder and salt together; in a saucepan heat the milk and melt the butter.", "Stir the dry ingredients and milk mixture into the egg mixture as quickly as possible; stir in vanilla and lemon extract if using.", "Pour batter into pan and bake 25-30 minutes, until toothpick tests clean; cool 10 minutes, remove from pan and cool completely on wire rack; slice the cake into two layers.", "Filling: In a double boiler over medium-low heat, cook sugar, flour, salt and milk for 15 minutes, stirring constantly until thickened and bubbly.", "Temper the egg with the cooked mixture and pour back into the pan; cook another 3-5 minutes until thickened; remove from heat, stir in vanilla or orange extract and cool completely with plastic wrap on custard surface; spread on bottom cake layer, add top layer.", "Frosting: Bring the sugar, cornstarch, chocolate, salt and water to a boil; cook, stirring, 3-5 minutes or until thickened enough to coat a spoon thickly; remove from heat, add butter and vanilla and stir until combined.", "Cool a bit, but while still warm, pour and spread frosting over the top of cake, allowing some to drip down sides if desired; there may be more frosting than you need, use it for another purpose."]
