Lemon Pudding Cake
["1/4 c. butter or margarine", "1 1/2 c. sugar", "4 egg yolks", "1/4 c. unsifted all-purpose flour", "2 c. milk", "1 tsp. grated lemon peel", "1/2 c. lemon juice", "4 egg whites"]
["Preheat oven to 350\u00b0.", "In large bowl, with portable electric mixer, beat butter with sugar until well blended.", "Beat in egg yolks until blended.", "Blend in flour and milk; stir in lemon peel and lemon juice.", "Beat egg whites until soft peaks form when beater is slowly raised.", "Using a wire whisk or rubber scraper, fold egg whites into lemon mixture.", "Turn mixture into a 1 1/2-quart casserole.", "Set casserole in pan containing 1-inch boiling water.", "Bake for about 1 hour and 15 minutes or until golden brown and silver knife inserted 1-inch from center comes out clean.", "Let stand for 30 minutes before serving.", "Serve warm, with whipped cream, if desired.", "Makes 6 servings."]
["butter", "sugar", "egg yolks", "flour", "milk", "lemon juice", "egg whites"]