Pineapple Sour Cream Cake
["1 box Duncan Hines butter recipe golden cake mix", "1 (20 oz.) can crushed pineapple, undrained", "1 c. sugar", "1/3 c. cornstarch", "1 Tbsp. lemon juice", "2 Tbsp. margarine", "2 c. sour cream", "1 tsp. vanilla"]
["Preheat oven to 350\u00b0.", "Grease and flour 2 round cake pans. Mix cake and bake in prepared pans according to package directions.", "Cool as directed and slice layers in half.", "Mix pineapple, sugar, cornstarch and lemon juice until thick.", "Add margarine. Cool.", "Add sour cream and vanilla to cooled filling. Spread filling over each layer and stack.", "Cover and refrigerate at least 24 hours."]
["butter", "pineapple", "sugar", "cornstarch", "lemon juice", "margarine", "sour cream", "vanilla"]