1 c. chopped nuts
1 c. miniature marshmallows
1 (18 1/2 oz.) pkg. devil's food cake mix
1 c. water
1 c. raisins (optional)
1 (6 oz.) pkg. chocolate chips
4 eggs
1 c. mayonnaise

Grease and flour tube pan. Mix together nuts, raisins, marshmallows, and chocolate chips; set aside. Beat cake mix, eggs, mayonnaise, and water on low speed until just blended. Beat on medium for 2 minutes. Fold in nut mixture; pour into prepared pan. Bake at 350 degrees for 25 to 30 minutes. Cool. Dust with powdered sugar.