1/2 c. butter
1 1/2 c. sugar
3/4 c. milk
2 c. cake flour
1/2 c. ground poppyseed
4 egg whites
2 tsp. baking powder
1/4 tsp. salt

Soak poppyseeds in milk for 1 hour. Cream butter and sugar well. Sift dry ingredients and add to creamed mixture. Add the milk and poppyseed and mix thoroughly. Beat egg whites until stiff and fold into batter. Bake in a greased 9 x 13 inch pan at 350 degrees for 45 minutes. Sprinkle with powdered sugar.