Modified from Food Network Magazine
3/4 cup mayonnaise
1/3 cup sour cream
1/3 cup buttermilk
1 tsp coarsely ground pepper
1/2 tsp red pepper flakes
1/4 tsp garlic powder
1 tbsp parsley, chopped (or 1 tsp dried)
1 tbsp chives, chopped
Pinch of salt
Whisk mayo and sour cream with sour cream and buttermilk, peppers and garlic powder. Stir in parsley and chives and season with salt.