1/4 c. poppy seeds
1 1/2 c. sugar
2 1/2 c. flour
1/2 c. sugar, mixed with 1 tsp. cinnamon
1 c. butter
4 eggs, separated
1 tsp. vanilla
1 tsp. baking soda
1 c. buttermilk

Soak poppy seeds in buttermilk for 10 minutes. Cream together the 1 1/2 cups sugar and butter. Add egg yolks; add vanilla. Beat egg whites until stiff and add to mixture. Add poppy seeds and buttermilk. Pour 1/3 of batter into a greased 10 inch tube pan. Do not flour pan. Sprinkle with 1/2 of sugar- cinnamon mixture. Repeat with second layer of batter, rest of sugar-cinnamon mixture. Add third layer of batter. Bake 1 hour at 350 degrees. Top with powdered sugar.