Chipotle Dipping Sauce for beer-battered onion rings 1/2 cup mayonnaise 1 tablespoon ketchup 1/2 chipotle pepper in adobo sauce, minced 1/2 teaspoon adobo sauce from can 1/2 teaspoons chili powder 1/4 teaspoon of cayenne pepper 1/4 teaspoon salt Stir together all of the ingredients in a small bowl.