Chocolate Silk Pie
["1/4 lb. butter", "3/4 c. sugar", "1 1/2 oz. melted unsweetened chocolate", "1 tsp. vanilla", "2 eggs"]
["Whip the butter", "and sugar until light.", "Add the chocolate and vanilla.", "Beat until blended. Add 1 egg and beat 5 minutes. Add the other egg and beat 5 more minutes. Fill baked pie shell. Chill."]
["butter", "sugar", "chocolate", "vanilla", "eggs"]