1 In a large bowl, cream the white sugar and shortening until light and fluffy. Beat the eggs, and add to the sugar mixture. Add the prunes.
2 In another bowl, sift the flour, soda, baking powder, 1 teaspoon cinnamon, nutmeg, and salt. Add these dry ingredients alternately with the buttermilk to the sugar mixture.
3 Pour the batter into 2 greased and floured 9 inch layer pans. Bake at 375 degrees F (190 degrees C) for about 30 minutes. Cool.
4 To Make the Mocha Icing: Begin by creaming the butter. Blend in the egg yolk. Sift the confectioners’ sugar, cocoa, and 1 teaspoon cinnamon together. Add this sugar mixture alternately with the hot coffee to the creamed butter. Frost the cooled cake.