Grandma Ila Reid's Buttermilk Dressing

Grandma Reid’s Buttermilk Dressing (lower salt version)
2 Cups Mayonnaise
2 Cups Buttermilk (or for lower fat and less fuss, you can use 2 cups milk, minus 4 Tablespoons with 4 Tablespoons lemon juice added to the milk. Let milk sit about 5 minutes to curdle.)

Of the following spices, I have one be a salt, and the other one a powder…Grandma often had both spices be salts so it was VERY salty!

1 teaspoon garlic powder or salt
1 teaspoon onion powder or salt
½ to 1 teaspoon black pepper
About ½ Tablespoon dried parsley

Combine all ingredients and whip with a wire beater or use a blender—whatever. Mix until smooth. It will thicken overnight.