Cream Cheese-Swirled Carrot Cake
["1 (8 oz.) pkg. cream cheese, softened", "1/4 c. sugar", "1 tsp. vanilla", "1 egg", "1 pkg. Betty Crocker SuperMoist carrot cake", "1/2 c. chopped nuts"]
["Heat oven to 350\u00b0.", "Generously grease and flour 13 x 9-inch pan."]
["cream cheese", "sugar", "vanilla", "egg", "cake", "nuts"]