Pommes frites are the defining accompaniment to every grilled steak in France — and the technique of double-cooking (cuisson en deux temps) is what separates a true French fry from a soggy chip. The method was perfected in Belgian and Northern French friteries and adopted universally. Choose floury potatoes (Bintje is the gold standard; Maris Piper or Russet Burbank are alternatives) — the high starch content produces a fluffy interior. Peel, cut into uniform batons 1cm × 1cm × 7cm, and soak in cold water for 30 minutes (this removes surface starch that would cause the frites to stick together and brown unevenly). Drain and dry thoroughly — wet potatoes cause the oil to splatter violently and the temperature to crash. FIRST COOK (blanching): fry at 140-150°C for 6-8 minutes until cooked through but completely pale — no colour whatsoever. The interior should be soft and tender. Remove, drain on a wire rack, and cool completely. This step can be done hours in advance. SECOND COOK (finishing): fry at 180-190°C for 2-3 minutes until deep golden and shatteringly crisp. The science: the first cook gelatinises the starch and partially dehydrates the exterior; the second cook at higher temperature creates rapid surface dehydration and Maillard browning, producing the characteristic glass-crisp shell around a fluffy, steaming interior. Season with fine salt the instant they leave the oil — the salt crystals need residual oil to adhere. Serve in a paper cone, a napkin-lined bowl, or simply piled alongside a steak. The perfect frite is audibly crisp when bitten, yielding to a soft, potato-flavoured interior. They must be eaten within 5 minutes.
Floury potatoes only — waxy varieties produce dense, heavy frites without the fluffy interior Soak in cold water 30 minutes — removes surface starch for even cooking and non-sticking Dry thoroughly before frying — water drops the oil temperature and causes dangerous spattering First cook at 140-150°C (pale, cooked through); second cook at 180-190°C (golden, crisp) Salt immediately after the second cook — fine salt adheres only to the hot, oily surface
After the first cook, freeze the blanched frites on a tray for 20 minutes — the ice crystals that form on the surface shatter during the second cook, creating an ultra-crisp, rough-textured exterior A tablespoon of white vinegar in the soaking water lowers the pH, which slows starch breakdown and produces a firmer, crispier frite For the absolute best frites, cook the first stage in beef tallow (the original Belgian method) — the animal fat adds a depth of flavour that vegetable oil cannot match
Single-cooking — produces frites that are either pale and raw inside or golden but dried-out throughout Uneven cuts — thick batons are raw inside while thin ones are burnt; use a mandoline or knife guide Wet potatoes in hot oil — dangerous spattering and a catastrophic temperature drop Salting too early (before the second cook) — the salt draws moisture from the blanched frites and prevents crisping Holding under a heat lamp — frites lose crispness within 3 minutes; they must go from oil to table instantly
Escoffier, Le Guide Culinaire; Larousse Gastronomique