Grease and slightly flour a loaf or tube cake pan. Do not begin until all the ingredients are at room temperature. Mix and sift flour, baking powder, and salt together 3 times. Separate the eggs. Beat the egg yolks. Beat egg whites until stiff, but not dry. Cream butter until soft. Add sugar gradually and beat well until light and fluffy.

Add well beaten egg yolks. Add the flour mixture, alternately with milk, a small amount at a time, beating until smooth after each addition. Add flavorings. Gently fold in egg whites. Pour into the prepared cake pan.

Bake for 50 to 60 minutes. Cool before removing from pan. Store covered at room temperature.