 Clam dip remained popular throughout the 1960s and 1970s in the U.S., at which time prepared manufactured clam dips were available in U.S. supermarkets.As various tomato based salsas gained more popularity with American consumers beginning in the late 1980s and 1990s, the popularity of clam dip and similar dips made with sour cream and cream cheese declined.Clam dip is typically prepared using chopped or minced clams, sour cream or cream cheese, and various seasonings, and usually served chilled.