1 pkg. Duncan Hines fudge marble deluxe cake mix
1 pkg. instant vanilla pudding mix
1/2 c. oil
4 eggs
1 c. water

Blend all ingredients except the small packet in a large bowl, then beat at medium speed for 2 minutes. Pour 3/4 of batter into a greased and floured tube pan. Blend contents of small packet into remaining batter.

Spoon dark batter here and there over light batter. Pull knife through batter in wide curves several times. Bake at 350 degrees for 50 minutes. Dust with confectioners' sugar.