Step 1

Combine the ingredients in a medium bowl: Stir together blue cheese, buttermilk, sour cream, garlic clove, lemon juice, Worcestershire sauce, pepper, ground mustard powder, and salt.If a creamier sauce is desired, blend with an immersion blender or in a food processor.

Step 2

Refrigerate the sauce: Place in refrigerator for 30 minutes for flavors to blend.

Step 3

Serve: Use immediately and garnish with additional crumbled blue cheese or transfer to an airtight container and store in refrigerator for up to a week.