Onion Salad Dressing
["1/2 c. sugar", "1 tsp. salt", "1 tsp. dry mustard", "1 tsp. celery seed", "2 Tbsp. onion", "1/4 c. vinegar", "1 c. salad oil"]
["Mix well.", "Add slowly 1 cup of salad oil.", "Add it last.", "Whip with spoon as oil is added.", "Dry ingredients added first."]
["sugar", "salt", "dry mustard", "celery", "onion", "vinegar", "salad oil"]