Recipe Black Walnut Cake

Ingredients
1 cup chopped black or English walnuts
3 cups all-purpose flour, divided
1 cup butter, softened
2 cups sugar
4 eggs
1 teaspoon vanilla extract
2 teaspoons baking powder
1/4 teaspoon salt
1 cup milk
FROSTING:
1 3/4 cups sugar
4 egg whites
1/2 cup water
1/2 teaspoon cream of tartar
1 teaspoon vanilla extract

Directions
In a bowl, toss walnuts with 1/4 cup flour; set aside. In a mixing bowl, cream butter and sugar. Add eggs, one at a time, beating well after each addition. Add vanilla; mix well.
Combine the baking powder, salt and remaining flour; add to the creamed mixture alternately with milk. Stir in the reserved nut mixture.
Transfer to a greased and floured 10-in. tube pan. Bake at 350 degrees F for 50-55 minutes or until a toothpick inserted near the center comes out clean. Cool for 10 minutes before removing from pan to a wire rack to cool completely.
In a heavy saucepan, combine sugar, egg whites, water and cream of tartar. With a portable mixer, beat on low speed for 1 minute. Continue beating on low speed over low heat until frosting reaches 160 degrees F, about 9 minutes.
Pour into a large mixing bowl; add vanilla. Beat on high speed until frosting forms stiff peaks, about 7 minutes. Frost the cake.