Blend crackers in blender until finely powdered. Add parsley flakes, onions and dillweed. Blend until thoroughly powdered. Put into 1 quart mixing bowl, using wire whisk; stir in onion salt and powder and garlic salt and powder. Mix well. Makes 42 tablespoons. Store mix in airtight containers in a cool dry place, out of direct sunlight. Use within 1 year.
FOR DRESSING: Combine 1 tablespoon of mix with 1 cup mayonnaise and 1 cup buttermilk. Store in refrigerator 2 weeks.
FOR DIP: 1 1/2 tablespoons in pint of sour cream.