fleur de sel <ref>a type of sea salt

Fleur de sel, literally "flower of salt" in French, is a delicate, hand-harvested sea salt formed on the surface of solar salt evaporation ponds, primarily along the Atlantic coast of France, particularly in the Guérande region of Brittany. The crystals develop as a thin, fragile crust on top of seawater as it evaporates, and are traditionally collected using wooden rakes at dawn or dusk when humidity prevents the salt from being too dry and brittle. Fleur de sel crystals are characteristically pyramidal and hollow, with a pale gray or off-white color due to mineral content (primarily magnesium chloride) and trace elements. The flavor is subtly briny with mineral complexity, distinctly different from refined table salt or coarser sea salts.

Fleur de sel is distinguished by its irregular crystal structure, moisture content, and relative rarity compared to bulk harvested sea salt. Premium fleur de sel commands significant price premiums due to labor-intensive harvesting methods and limited annual production. Regional variations exist, notably French fleur de sel from Guérande, Portuguese fleur de sal from the Douro estuary, and Spanish flor de sal from Andalusia.

Fleur de sel functions primarily as a finishing salt rather than a cooking ingredient, applied to dishes moments before serving to preserve its delicate crystal structure and subtle mineral character. It is prized in French, Mediterranean, and contemporary haute cuisine for garnishing cured meats, fresh oysters, caramelized desserts, and roasted vegetables. The salt's pyramidal crystals provide textural contrast and a burst of nuanced salinity that dissolves gradually on the palate, making it particularly suited to simply prepared foods where salt can be appreciated as a flavor component. It is occasionally incorporated into artisanal caramels and chocolates, and used sparingly in gourmet butter preparations.