In a large mixing bowl, combine all the ingredients for the dry ranch mix: coarse ground black pepper, dried parsley, garlic salt, granulated garlic, onion powder, kosher salt, and dried dill weed. Mix them well until they are evenly distributed. This dry mix can be stored in an airtight container for future use.
In a separate mixing bowl, combine 1 tablespoon and 2 teaspoons of the dry ranch mix with 1 cup of sour cream, 1 cup of mayonnaise, 1 cup of buttermilk, and 2 teaspoons of lemon juice.
Using your whisk, combine all the ingredients until the mixture is smooth and creamy. Make sure there are no lumps from the sour cream or mayonnaise.
Taste your ranch dressing and feel free to adjust the seasoning. If you prefer a stronger flavor, add a bit more of the dry ranch mix or a pinch of salt.
Transfer your ranch dressing to a sealed container and refrigerate for at least 30 minutes before serving. This allows the flavors to meld together beautifully.