But unlike pit masters who rabidly guard their secret sauce recipes, fry cooks are an open book. All work with the same four elements: soft-shell clams, a dipping liquid, a coating and oil. According to almost all the cooks and owners I met the liquid is usually evaporated milk, and the coating is nothing more than some combination of flours: regular, corn or pastry. Most places use canola or soybean oil, which are high in unsaturated fats. Only Woodman’s and Essex Seafood, in Essex, Mass., still fry clams in pure lard.