1 pkg. fudge marble cake mix
1/3 c. butter, softened
1 egg
2 (8 oz.) pkg. cream cheese, softened
3/4 c. sour cream
1/3 c. water
2/3 c. sugar
2 eggs

Preheat oven to 350 degrees. Grease 9x13 inch pan. Reserve 1 cup dry cake mix.

Blend remaining dry cake mix, butter and 1 egg on low speed until dough forms. Pat in bottom of pan. Bake until golden brown, about 10 minutes.

Beat cream cheese and sour cream until smooth. Blend reserve cake mix, water and sugar and 2 eggs into cream cheese mixture. Beat about 2 minutes until smooth. Reserve 1 1/4 cups cream cheese mixture; pour remaining mixture over crust.

Blend reserved cream cheese mixture and marbling mixture in a small bowl on low speed. Drop dark batter by generous tablespoonfuls randomly in 6 to 8 mounds onto yellow batter. Cut through batter with knife in S-shaped curves in one continuous motion. Turn pan 1/4 turn and repeat for marbled effect.

Bake 31-36 minutes. Run knife along edges of cake to prevent cracking. Cool; refrigerate.