Streusel Coffee Cake Recipe

In a small bowl, combine the nuts, brown sugar, butter and cinnamon; set aside. In a large bowl, cream butter and sugar. Beat in egg yolks, one at a time, beating well after each addition. Beat in vanilla. Combine the dry ingredients; add to creamed ingredients alternately with sour cream. In another bowl, beat egg whites on high speed until stiff peaks form. Fold into batter. Pour half of the batter into a greased and floured 10-in. fluted tube pan; sprinkle with nut mixture. Pour in remaining batter. Bake at 350° for 45-55 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. Sprinkle with confectioners' sugar. Yield: 14 servings.