1 18-ounce box chocolate cake mix
1 pint sour cream
1 small box instant chocolate pudding
1 6-ounce bag chocolate chips
3/4 cup vegetable oil
1 cup water
Vanilla ice cream (optional)
Spray crockpot with non-stick spray. Mix all ingredients in a medium bowl. Pour into crockpot. Cook on low for 5 hours. Serve with ice cream.