You’ll Need:Cake 1/2 cup shortening 1 3/4 cups granulated sugar 1 egg yolk 2 teaspoons vanilla extract 4 eggs 2 cups sifted all-purpose flour 1/2 cup unsweetened cocoa powder 1 teaspoon baking soda 1 teaspoon salt 3/4 cup cold water 1/2 cup sour cream Coconut Macaroon Filling 1 egg white