Cole Slaw Dressing
["1 c. vinegar", "2 Tbsp. butter", "1 egg, well beaten", "dry mustard", "1/2 tsp. flour", "salt and pepper"]
["Put vinegar and butter in top of double boiler until butter is melted, then add other ingredients after they have been mixed together.", "Cook until thick or to your liking."]
["vinegar", "butter", "egg", "mustard", "flour", "salt"]