Ranch One Restaurant

Does anyone know how restaurants make his Black Angus ranch dressing?
1 / 4 cup butter 3 tablespoons of powder. 3 tablespoons chopped dried onions. minced 1 tablespoon dried parsley. dried chives 1 tsp. salt 1 / 2 tsp. garlic powder 1 / 2 tsp. ground celery seed 1 / 2 tsp. black pepper in a bowl or container that can be covered – Combine all ingredients. Mix well. Store tightly covered until ready to use. Makes about 3 / 4 cup of the mixture. Enough to prepare 8 cups of dressing.
Tortolita Easement 1of 2: Saguaro Ranch; Marana and Pima County, Arizona