Heat oven to 350°F.
In a mixing bowl, combine cake mix and add 2/3 cups of water. Add softened butter and three eggs, one at a time, mixing after each addition.
Stir in sour cream, mixing until large lumps disappear.
Bake in oven for 30 minutes, check on the cake from time to time to prevent overcooking.
Submitted by: Romone and Brandon