Sour Cream Streusel Cake
["1 c. sour cream (low-fat works well)", "1/3 c. Crisco oil", "1/3 c. water", "1/4 c. granulated sugar", "4 eggs", "1 pkg. pudding recipe cake mix"]
["Preheat oven to 375\u00b0.", "Reserve 2 tablespoons dry cake mix for filling."]
["sour cream", "Crisco oil", "water", "granulated sugar", "eggs", "pudding recipe cake mix"]