In a small bowl, combine the first seven ingredients. Store in an airtight container in a cool, dry place for up to 1 year. Yield: about 6 tablespoons mix (enough to make 6 batches).
To prepare dressing: In a bowl, combine 1 tablespoon mix with mayonnaise and buttermilk; refrigerate. Yield: 2 cups.
To prepare dip: In a bowl, combine 1 tablespoon mix and sour cream; refrigerate for at least 1 hour before serving.
