Caramel Cake
["1 (8 oz.) carton sour cream", "1/4 c. milk", "1 c. butter, softened", "2 c. sugar", "4 eggs", "2 3/4 c. all-purpose flour", "2 tsp. baking powder", "1/2 tsp. salt", "1 tsp. vanilla extract", "1 tsp. rum extract (optional)", "Caramel Frosting"]
["Combine sour cream and milk.", "Cream butter; gradually add sugar, beating well at medium speed of an electric mixer.", "Add eggs, one at a time, beating well after each addition."]
["sour cream", "milk", "butter", "sugar", "eggs", "flour", "baking powder", "salt", "vanilla extract", "rum", "Caramel Frosting"]