With dry mustard and onion.
Here’s a version from the July 22, 1930 edition of the Oshkosh (Wisconsin) Daily Northwestern, presumably written by someone who had just obtained a stopwatch and wanted to show it off:
Celery Seed Dressing
(For Fruit or Vegetable Salads)
1/2 cup of sugar
Chill the ingredients and utensils. Mix the sugar, mustard, paprika, salt, onion juice, and oil. Beat three minutes. Slowly add in the vinegar. Beat three minutes. Add celery seed and beat one minute. Chill. When ready to serve beat thoroughly and pour portions over salad ingredients which have been arranged on crisp lettuce leaves.
This type of dressing is advised to serve on salads which are served with meat, fish, or fowl dinners.
From the box of L.R. from Winston-Salem, North Carolina.
White Celery Seed Dressing
1-1/3 c. sugar
2 c. oil
3/4 c. vinegar
2 t. dry mustard
2 t. salt
2 t. celery seed
1 medium onion, chopped
Combine all ingredients and whip well–preferably in a blender.
Makes about 1 qt.