Poppy Seed Cake
["1 c. butter or margarine", "1 1/2 c. sugar", "1 can Solo poppy seed filling", "4 eggs, separated", "1 tsp. vanilla", "1 c. dairy sour cream", "2 1/2 c. all-purpose flour", "1 tsp. baking soda", "1 tsp. salt", "confectioners sugar"]
["Preheat oven to 350\u00b0.", "Grease and flour a 12-cup Bundt pan or 10-inch tube pan.", "Set aside.", "Beat butter and sugar in a large bowl until light and fluffy.", "Add poppy seed filling and beat until blended.", "Beat in egg yolks, 1 at a time, beating well after each addition.", "Add vanilla and sour cream; beat just until blended.", "Stir flour, baking soda and salt until mixed and add to poppy mixture gradually, beating well after each addition."]
["butter", "sugar", "filling", "eggs", "vanilla", "sour cream", "flour", "baking soda", "salt", "confectioners sugar"]