BOSTON CREAM PIE

Add beaten egg yolks to stiffly beaten whites and gradually add flour, baking powder, sugar and salt which have been sifted together four times; add hot milk very slowly; add vanilla. Bake in deep layer cake tin in moderate oven about 35 minutes. When cool, split and put between layers the following cream filling. Sprinkle cake with powdered sugar.

CREAM FILLING

Mix sugar, cornstarch, salt and beaten eggs; add gradually scalded milk; add butter; cook in double boiler until thick and smooth, stirring constantly; add flavoring; cool and put between layers of cake.