Sift flour once, measure, add baking powder and salt and sift together three times. Cream butter thoroughly add sugar gradually, and cream together until light and fluffy. Add flour, alternately with milk a small amount at a time, beating after each addition until smooth. Add vanilla. Fold in egg whites quickly and thoroughly. Bake in two greased 8-inch layer pans in moderate oven (375 degrees F.) 25 to 30 minutes. Spread Fresh Strawberry Frosting ( see recipe between layers and on top and sides of cake. Spread Fresh Strawberry Glace ( see recipe 43 ) over frosting, letting it run down on sides: Let stand 1 hour to become firm.