Rum Cake - cooking recipe

Ingredients

1 c. butter
2 c. granulated sugar
1 c. milk (not too cold)
3 1/2 c. cake flour, sifted once before measuring
8 egg whites, beaten stiff (but not too dry)
3 1/2 tsp. baking powder
1 tsp. vanilla
pinch of salt

Preparation

Cream the butter and sugar a little at a time.
Add 1/3 each of milk, flour and egg whites, in the order named, beating after each addition and beating well and long after the last addition. Keep out 2 tablespoons of flour, into which mix the baking powder. Add this when all beating is over.