1 cup sour cream
3/4 cup buttermilk
1 teaspoon crushed garlic
1/2 teaspoon ground black pepper
1/2 teaspoon dry mustard
1/2 teaspoon salt, or to taste
1/2 teaspoon white sugar
1 pinch cayenne pepper, or to taste
1 teaspoon Worcestershire sauce
4 ounces frozen blue cheese, grated
Place mayonnaise, sour cream, and buttermilk in a bowl. Add garlic, black pepper, dry mustard, salt, sugar, cayenne, and Worcestershire sauce. Whisk together thoroughly. Mix grated blue cheese into the cream base a little at a time to ensure it is evenly incorporated and doesn't clump. Cover bowl with plastic wrap and refrigerate for at least 3 hours (preferably overnight) to consolidate the flavors.