Cake: Preheat oven to 350F and butter two 8" round baking pans. Cream sugar and butter in a large bowl with an electric mixer until light and fluffy. Add eggs one at a time, beating well after each. Stir together flour, baking powder and salt in a medium bowl. Add to butter mixture alternately with buttermilk. Stir in prunes and spread equal amounts into each pan. Bake for 45 minutes, until a toothpick inserted into the center comes out clean. Let cool in pans; carefully remove. Spread frosting between layers, and on the top and sides of cake.

Frosting: Beat together cream cheese, butter and vanilla extract in a medium bowl until light and fluffy. Gradually beat in powdered sugar until smooth.

Tip // For evenly level layers wrap dampened cake strips around the pans before baking.