Chocolate Nut Upside-Down Cake
["10 Tbsp. butter or margarine", "1/4 c. firmly packed light brown sugar", "2/3 c. light corn syrup", "1/4 c. heavy cream", "1 c. broken walnuts", "1 3/4 c. sifted cake flour", "2 tsp. baking powder", "1/4 tsp. salt", "1 1/2 c. granulated sugar", "2 eggs, separated", "3 sq. unsweetened chocolate, melted", "1 tsp. vanilla extract", "1 c. milk"]
["Melt 4 tablespoons of butter in small saucepan; stir in brown sugar.", "Heat until bubbly.", "Stir in corn syrup and cream.", "Heat, stirring constantly, just to boiling.", "Add nuts.", "Pour into generously buttered 10-inch (12-cup) Bundt pan.", "Put aside."]
["butter", "brown sugar", "light corn syrup", "heavy cream", "walnuts", "cake flour", "baking powder", "salt", "sugar", "eggs", "unsweetened chocolate", "vanilla extract", "milk"]