Deviled Eggs
["1 doz. hard-boiled eggs", "2 tsp. vinegar", "3/4 tsp. salt", "1/8 tsp. pepper", "1 tsp. mustard", "2 Tbsp. melted butter", "3 Tbsp. mayonnaise"]
["Cut eggs in halves lengthwise; remove yolks.", "Mash with fork. Add remaining ingredients to yolks; whip until smooth and fluffy. Heap into whites.", "Crisscross with tines of fork.", "Refrigerate. Makes 24 halves."]
["eggs", "vinegar", "salt", "pepper", "mustard", "butter", "mayonnaise"]