Chocolate Cake Recipe

I have made a lot of cake in my day. A LOT! Here is a recipe I have come to like the most.

1 Box cake mix
1 Box Pudding
1/2 Cup Butter (in place of the oil)
1 Cup Buttermilk
1/3 Cup Sour Cream
3 Eggs

Mix all together, bake at 350 for 30-40 min.