Green Ember

Five ingredients, named and sourced on purpose. Each one does one thing — shell, flavour, body, finish, perfume — and nothing in the recipe is there to colour, extend or disguise what you taste.

• The green shell

  La coque verte

  Almond flour sifted three times, caster sugar, egg white meringue, and a measured spoon of pistachio paste folded into the batter itself. The French method — macaronnage until the mixture falls like lava, piped onto trays, left to crust (le croûtage) for thirty to forty-five minutes before baking.

  Its green is not a dye. It is the paste. A paler, more honest green than the printed emerald you see on supermarket shelves — the colour pistachio actually is, once it has been ground and warmed.

• Sicilian Bronte pistachio paste

  Pâte de pistache de Bronte

  Pistachios grown on the volcanic slopes of Mount Etna, in the small town of Bronte, Sicily — a PDO-protected variety that most French patissiers consider the finest in the world. The volcanic soil gives the nut an unusually dense, resinous perfume you cannot find in the lighter pistachios of California or Iran.

  The paste is cold-ground, with nothing added: no sugar, no oil, no colouring. One ingredient on the label. One ingredient in the ganache. Which is why the macaron tastes of pistachio and not of a flavour inspired by pistachio.

• White chocolate couverture

  Couverture ivoire

  A high-cocoa-butter ivory couverture, chopped and melted into warm cream. White chocolate is not an afterthought here — it is the frame for the pistachio: it carries the fat and the sugar, so the pistachio can carry the taste.

  Lesser pistachio macarons use a buttercream for the filling. We do not: the butter in a buttercream covers the pistachio, where the cocoa butter in a good couverture steps aside after one second and lets the nut come forward.

• Toasted pistachio shards

  Éclats de pistache grillés

  Whole Bronte pistachios, dry-toasted in a hot pan without oil until the natural fats rise to the surface, then roughly chopped by hand. The shards are placed on the shell by hand, in the narrow window between piping and crust formation — so they bond to the surface instead of sitting on top of it like a decoration.

  They do two things: they give the first bite a small, deliberate crunch, and they tell the eye what the mouth is about to find — the pistachio is in the macaron, not on it.

• A pinch of fleur de sel

  Une pincée de fleur de sel

  A single pinch of fleur de sel de Guérande is whisked into the ganache. You do not taste salt. You taste a pistachio that is a little rounder, a little longer, a little more itself — the way salt does its real work in French patisserie: unseen, but missed when absent.

  Nothing in it is an extract. The perfume you smell before the first bite is a roasted nut, folded into real cream.