Celery Seed Dressing - cooking recipe

Ingredients

1/3 c. cider vinegar
1/2 c. sugar
1 tsp. dry mustard
1 Tbsp. grated onion
1 tsp. salt
1 tsp. celery seed
1 c. salad oil

Preparation

In a covered blender container at low speed, blend all ingredients (except oil) until well mixed.
Then turn control to high speed.
Remove center of cover or cover; very slowly pour oil in a steady stream into the mixture.
Continue blending until well mixed.
Cover and refrigerate dressing.