Taste of Home offers a recipe for Black Walnut Cake, which makes 12 to 16 servings. To make this recipe, combine 1 cup chopped walnuts with ? cup all-purpose flour. In a separate bowl, cream 1 cup softened butter with 2 cups sugar.
Add 4 eggs, one at a time; beat well after each egg is added. Thoroughly mix in 1 teaspoon vanilla extract. Combine 2 teaspoons baking powder, ? teaspoon salt and 2 ? cups all-purpose flour. Add to creamed mixture alternately with 1 cup milk. Stir in walnut mixture.
Transfer batter to a greased and floured 10-inch tube pan. Bake at 350 degrees for 50 to 55 minutes or until a toothpick inserted by the center comes out clean. Cool for 10 minutes, and then remove from pan to a wire rack.
Combine 1-3/4 cups sugar, 4 egg whites, ? cup water and ? teaspoon cream of tartar in a heavy saucepan. Use a portable mixer to beat mixture on low speed for 1 minute. Continue beating on low speed, and heat on low heat until frosting reaches 160 degrees. Pour frosting into stand mixer bowl, and add 1 teaspoon vanilla extract. Beat on high speed until stiff peaks are formed; frost cooled cake.