Make seasoning. Combine all the ingredients for your ranch seasoning in a small bowl. Mix together using a whisk or fork to ensure there are no clumps.
1 teaspoon coarse Kosher salt, ½ teaspoon cracked black pepper, ½ teaspoon onion powder, ½ teaspoon garlic powder, ½ teaspoon dried parsley, ¼ teaspoon dried dill, ¼ teaspoon ground mustard powder, ¼ teaspoon celery seeds, ¼ teaspoon red pepper flakes