1 cup buttermilk
1/2 cup sour cream
1/4 cup mayonnaise
desired mix-ins (see below)
coarse salt and pepper
In a medium bowl, whisk together buttermilk, sour cream, and mayonnaise until smooth. Whisk in desired mix-in. Season to taste with salt and pepper.
Green Goodess ~ 1/2 avocado, mashed until smooth, 1/4 cup finely chopped chives. 2 tablespoons fresh lemon juice, 2 tablespoons chopped fresh parsley.
Roasted Garlic ~ 1 small head roasted garlic, skins removed and cloves mashed until smooth (about 2 tablespoons).
Blue Cheese ~ 3 ounces blue cheese, crumbled.
Ranch ~ 1-1/2 reaspoons chopped fresh thyme leaves, 1 small garlic clove, minced, pinch of cayenne pepper.
Thousand Island ~ 1/3 cup ketchup, 3 tablespoons sweet pickle relish.
Peppercorn-Parmesan ~ 2 ounces finely grated Parmesan (2/3 cup), 1 teaspoon coarsely ground pepper.