1. Preheat oven to 350°F. Grease and flour 10-inch bundt pan.
2. For cake, combine cake mix, eggs, water, oil and ground walnuts in large bowl. Beat at medium speed with electric mixer for 2 minutes. Pour into prepared pan. Bake at 350°F for 45 to 55 minutes or until toothpick inserted in center comes out clean. Cool in pan 25 minutes. Invert onto serving plate. Cool completely.
3. For chocolate glaze, combine chocolate chips and butter in small heavy saucepan. Heat on low heat until chips are melted. Stir constantly until shiny and smooth. (Glaze will be very thick.) Spread hot glaze over cooled cake. Sprinkle with coarsely chopped walnuts.
4. For white chocolate glaze, combine white chocolate and shortening in small heavy saucepan. Heat on low heat until melted, stirring constantly. Drizzle hot glaze over top and sides of cake.
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