Pâtissier flan
Six yolks and a cream-and-milk custard, set slowly in a water bath, cold for hours, and unmolded at the last second so the caramel that was cooked first and poured down comes up as the sauce on top. The patience is the whole method — the custard is set by a heat too gentle to spoil it, and it is held until the setting finishes on the cold side of things.
Inspired by
The flan at the small pâtisserie, where the custard is set in a bain-marie, cold for hours before it is served, and unmolded in front of the diner, because the caramel was cooked first, poured down when the mold was cold, and the unmold is the move that brings it up. That is the structure of the dish — the last move is the first ingredient, and the unmold is what carries it. The home version that bakes the custard in a hot oven and serves it warm gets a set custard and a burnt sugar at the bottom that no one can get out of the mold, and the caramel that was supposed to be the sauce is instead the thing that traps the custard in the mold, and the dish is the one that never came out.
Technique notes
The setting is pan-heat at its gentlest end — the water-bath keeps the custard at a temperature that sets it without boiling it, and the boiling is what makes the curd and the lumpy custard. The unmold is its own article in the plate: the caramel that was poured down is the sauce that comes up, and the thin rim of the knife is the move that sets the two free from the mold. Nothing here is a heat; the heat is the one the water holds at a distance, and the unmold is the one that finishes what the water-bath started.
Why the restaurant does it this way
The custard is set in a water-bath, not a dry oven, because the yolk sets in a band, and the band is gentle at the flavor end and broken at the other: a degree too high and it's curdled, and once it's curdled the dish is over. The water holds the heat at a distance — the custard never sees the oven, only the water, and the water is what keeps it out of the broken end. The 4 hours of cold is the second half of the setting: the custard leaves the oven loose and comes up out of the mold set and clean, and the cold does that rest of the work without breaking what the water-bath built. The caramel is cooked first and poured down into the cold mold, not stirred in, because the caramel is the sauce and the unmold is what brings it up — stirred in, it's a dark, bitter streak through the custard, and at the bottom of the mold it's the thing that glues the flan down. Cooked first, cooled last, and the unmold carries it from the bottom to the top. The whole method is three moves of restraint: the water holds the heat, the cold finishes the set, and the thin rim of the knife sets it free. That is what the patience is for.
Equipment
- Four small molds, about 150 ml each, for the four servings — the mold is the one the unmold is for, and the unmold is the one the mold is out of
- A large, deep pan for the water-bath, deep enough to hold the custard at the 2/3 mark of the mold
- A large, heavy pan for the caramel — the caramel needs the heavy pan, and the heavy pan is the one that holds the heat
- A thin, sharp knife, for the rim of the unmold
Ingredients
- 6 egg yolks, for the custard — the yolk is the setting, and the setting is the custard
- 300 ml whole milk, for the body of the custard
- 150 ml double cream, for the richness of the custard
- 100 g sugar, split: 60 g into the custard, 40 g for the caramel
- 1 tsp vanilla, or the seed and pod of a split vanilla bean, for the custard
- A pinch of cinnamon, for the custard — the cinnamon is the one that goes in the custard, not the caramel
Method
- Warm the milk and cream, with the vanilla, to a bare simmer — the edge of a boil, not the boil, and the cinnamon in — and take them off the heat. Warm them to the edge, not past it, because the yolk is the one that sets at the edge, and the past-the-edge is the one that curds it.
- Whisk the yolks with the 60 g of sugar, and pour in the milk and cream, in a steady stream, so the yolk takes the heat without curdling. The yolk is the one that sets, and the curd is the one that breaks it, and the steady stream is the one that keeps the two from meeting the wrong way.
- Caramelize the 40 g of sugar in the heavy pan, over a gentle heat, until it is a deep, even amber — the caramel is the sauce, and the sauce is the one that comes up out of the mold. Pour the caramel into the four molds, and tilt the pan so the caramel runs over the bottom and up the sides, and set the molds flat while the caramel is still wet and runny. The caramel is the one that sets into the mold, and the mold is the one the caramel sets into.
- Pour the custard over the caramel, in the four molds, and set the molds in the water-bath, with the water at the 2/3 mark of the mold, and the lid on the water-bath, not on the mold. Put the water-bath in the oven at 150 °C / 300 °F, and let the custard set for 35–45 minutes, until the custard is set and the center still moves a little, like a custard that's still soft — not a custard that's wobbly, and not a custard that's firm. The center that still moves is the one that sets on the cold, and the cold is the one that sets it.
- Take the custard out of the water-bath, and let it cool to room temperature. Put the molds in the fridge for at least 4 hours, and the custard is set and clean when it comes up out of the mold. The cold is the one that does the setting without breaking it, and the cold is the one that sets the caramel into the one that comes up.
- At the last second, before the diner sits down, run the thin rim of the knife once all the way round the top of each mold, and set a plate over the mold, and turn the two over in a single motion, and lift the mold off. The flan stands on its caramel, and the sauce runs over the cold custard. Serve it straight away, while the caramel is still runny — by tomorrow it will be the thing that holds the flan in the mold.
Common failures
- A lumpy, curdled custard — the yolk has broken, and the custard is a lumpy, broken custard. The yolk met the hot milk all at once, or the water was at a rolling boil, or the oven was past the edge of a gentle heat. The yolk is the one that sets at the edge, and the past-the-edge is the one that curds it. The fix is the one move above: the steady stream, and the water at the 2/3 mark of the mold, and the oven at 150 °C.
- A custard that won't come out of the mold — the caramel has set too hard, and the custard has stuck to the mold, and the unmold is the one that has never happened. The caramel was cooked too long, or the custard was not cold for at least 4 hours, or the rim of the knife was not run once all the way round the top of each mold. The caramel is the one that sets into the mold, and the mold is the one the caramel sets into, and the one that comes up is the one that comes out over the custard. The fix is the one move above: the thin rim of the knife, and the 4 hours of the cold, and the single motion of the two over.
- A custard that tastes of boiled egg — the yolk has cooked too long, and the custard is the one that has the boiled-egg taste. The water was at a rolling boil, or the oven was past the edge of a gentle heat, or the custard was set too long. The water-bath is the one that holds the heat at a distance, and the past-the-edge is the one that gives the custard the boiled-egg taste. The fix is the one move above: the water at the 2/3 mark of the mold, and the oven at 150 °C, and the custard set for 35–45 minutes.
Variations & substitutions
- A larger, single mold, for the center of the table. The same method, in a single mold of 600 ml, and the custard is set for the same 40–50 minutes, and the cold is the one that sets it the same way, and the unmold is the one that brings it up the same way. The one that comes up is the one that comes out over the custard, and the custard is the one that comes up under the caramel.
- A coffee flan, for the table. The same method, with a 3–4 tablespoons of strong, cooled coffee stirred into the custard, and the coffee is the one that gives the custard the flavor of the coffee, and the cold is the one that sets it the same way. The coffee is the one that goes in the custard, not the caramel — the caramel is the sauce, and the coffee is the custard, and the two are the one that comes up.
- A dairy-light version, for the weeknight. The same method, with the cream in place of the milk, and the same 6 yolks, and the same cold for 4 hours. The custard is the one that sets the same way, and the one that comes up is the one that comes out over the custard, and the custard is the one that comes up under the caramel.
What to serve with it
Served plain, the way the pâtisserie serves it: the caramel is the sauce, the custard is the custard, and that is the whole thing. A coffee, a glass of sweet white — a sauternes — or a cold lager cuts the richness of the caramel. In the bistro's two-course service it is the dessert that runs last, cold and already plated — see the order of operations for where it sits on the clock.