Heat oven to 350 F.

In bowl, mix cake mix, zucchini, butter, eggs, 3/4 cup walnuts and 3/4 cup white chocolate chips. Pour into greased bundt pan and bake 40 minutes, or until toothpick inserted in center comes out clean.

Let cool about 10 minutes then remove from pan to finish cooling.

Mix powdered sugar and milk, about 1/4 cup, to reach desired consistency of frosting. Pour over cooled cake then sprinkle with remaining walnuts and remaining white chocolate chips. Cut and enjoy!