Martha Tupper Kay, a special lady from Mississippi, created recipes for McIlhenny Company for many years. She was famous for her shrimp sauce, which has a deliciously complex mix of condiments and spices. If you prefer, the sauce can be served on the side, for dipping.
In a large bowl, stir together the sour cream, mayonnaise, chili sauce, lemon juice, horseradish, Worcestershire sauce, Tabasco sauce, curry powder, chutney and capers. Pour the sauce over the shrimp and toss to coat. Refrigerate for several hours. To serve, mound the shrimp in a serving dish and sprinkle with parsley and additional capers, if desired.