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Fleur de sel: the buyer's guide
Fleur de sel is the thin crust of salt crystals that forms on the surface of a salt marsh on a warm, dry, windy afternoon, and is raked off by hand before it sinks. It is a finishing salt, not a cooking salt, and the difference between the real thing and a flaky imitation is on the label.
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What it is
In the Guérande marshes of Brittany and the Camargue in Provence, seawater is channelled through clay ponds that concentrate it under the sun. Grey sea salt (sel gris) crystallises on the clay floor; fleur de sel forms on the surface, is raked daily by paludiers, and is never washed or refined. The crystals are irregular, slightly moist, and taste of the sea rather than of pure sodium.
Guérande vs Camargue
Guérande (Brittany) fleur de sel is greyer and moister, with a mineral, briny taste; it carries the IGP Sel de Guérande protected origin and the Label Rouge quality mark. Camargue fleur de sel (the Baleine and Le Saunier de Camargue brands) is whiter and drier, with a cleaner taste and a slightly larger crystal. Both are real; Guérande is the one most French cooks reach for, Camargue is the one that photographs better.
What to look for on the label
'Fleur de sel de Guérande' with the IGP logo, or 'Label Rouge', or the Le Guérandais cooperative's name. 'Fleur de sel' alone, with no origin, can be any flaky sea salt. 'Sel de mer' is ordinary sea salt. The real thing is never perfectly white and never free-flowing.
How to use it
On food at the table, at the end: a pinch on sliced tomatoes, grilled steak, a soft-boiled egg, radishes with butter, caramel, chocolate. Cooking with it wastes it; use the much cheaper sel gris (grey sea salt) from the same marshes for pasta water and roasting. A 125 g pot lasts a household months.
Storing it
It is moist and will clump in a shaker. Keep it in a lidded ceramic or wooden pot (the Guérande cooperative sells it in a cork-topped jar) and take pinches with fingers. It does not go off.
What to buy
| Product | Why |
|---|---|
| Le Guérandais Fleur de Sel de Guérande | The cooperative's own, IGP and Label Rouge. |
| Fleur de Sel de Guérande 125 g jar | Standard size for a kitchen. |
| Le Saunier de Camargue Fleur de Sel | The Camargue classic in the cork-topped pot. |
| Sel Gris de Guérande (grey sea salt) | The cooking salt from the same marshes. |
| Fleur de Sel with Herbes de Provence | Seasoned version for grilling. |
| Salt pig / salt cellar | A lidded pot to keep it in. |
Questions people ask
Fleur de sel or Maldon?
Maldon is an English flaky salt made by boiling seawater; it is drier and crunchier and excellent on its own terms. Fleur de sel is moister and more mineral. Both are finishing salts; most serious kitchens keep both.
Why is it so expensive?
It is hand-raked, a few kilos per paludier per day, and only on days when the weather cooperates. A pot still works out to pennies per serving.
Is it lower in sodium?
Slightly, because of moisture and trace minerals, but not meaningfully. Its advantage is that you use less because it is on the surface of the food.
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