Chocolate Crockpot Cake (Crystal)

1 pkg chocolate cake mix
8 oz sour cream
1 cup chocolate chips
1 cup water
4 eggs
3/4 cup oil
1 pkg. instant chocolate pudding
Spray crockpot with non-stick spray
Mix everything together & pour in crockpot
Cook on Low 6-8 hours
High 3-4 hours
Optional-- poke holes in cooked cake while still warm and drizzle with caramel.
Serve with ice cream or whipped topping.