Chocolate Popovers

3/4 cup plus 2 tablespoons all-purpose flour 1/4 cup granulated sugar 2 tablespoons unsweetened cocoa powder 1/4 tsp salt 4 eggs 1 up milk 2 tbsps butter or margarine,melted 1/2 tsp vanilla powdered sugar  Position rack in loeer third of oven. Preheat oven to 375 degrees. Grease 6-cup popover pan or 6 (6oz) custard cups. Set custard cups in jelly-roll pan. Sift flour,granualated sugar, cocoa and salt into medium bowl; set aside. Beat eggs in large bowl with electric mixer at low speed 1 min. Beat in milk,butter and vanilla. Beat in flour mixture until smooth. Pour batter into prepared pan. Bake 50 min. Immediately remove popovers to wire rack. Generously sprinkle powdered sugar over popovers. Serve immediately. Makes 6 popovers