Spicy Prune Cake

1-3/4 blocks butter1 cup sugar3 cups flour, cake type preferred3 tsp. baking powder5 eggs (2-1/2 whites for frosting, 5 yolks and 2-1/2 whites for cake)1 cup stewed and sieved prunes3/4 cups juice (half prune juice and half milk; keep separate)2 tsp. baking soda dissolved in a little prune juice.1/2 tsp. nutmeg1/4 tsp. cloves1 tsp. cinnamonpinch…