Langoustines in Brown Butter on Sourdough
What the Clyde gave us, what the pan made golden.
Langoustines hit their peak in June and July along the Clyde — sweet, delicate, a bit of the sea without the bellow. Brown butter is the only sauce they need: it's Scotland in a pan, really. Toast keeps your hands from being too slippery, and anyway, sourdough from a local bakery is half the point.
How to Cook It
- 01
Kill and split your langoustines humanely
Pop each langoustine in the freezer for 15 minutes to stun it. Split lengthwise with a sharp knife — you'll see a dark thread down the middle, that's the gut; scrape it out gently. Rinse under cold water. Pat dry. They'll cook faster this way and you'll see the meat properly.
~10 min - 02
Toast your bread
Slice thick — thumb-width — and toast hard in a dry pan or under the grill until golden and crunchy on the outside but still a touch soft inside. You want it sturdy enough to hold butter and langoustine without weeping.
~4 min - 03
Make the brown butter
Put 80g of the butter in a heavy-bottomed pan over medium heat. Listen for it to crackle and pop — that's the water cooking off. Once it stops hissing and smells nutty, dark golden, and you see brown solids at the bottom, you're there. Don't burn it. Takes about 5 minutes. Keep swirling.
~5 min - 04
Cook the langoustines
In a separate large pan, heat a touch of olive oil on high. When it shimmers, lay the langoustines flesh-side down. Don't move them. Two minutes, then flip. Another minute or so — they'll curl slightly and the meat will turn opaque and firm. Season. They're done when they're just past translucent. Overcooked langoustines taste like rubber.
~4 min - 05
Butter the toast
While the langoustines are still warm, spread the remaining 20g of cold butter on the toast — it'll melt into all the nooks. A squeeze of lemon juice over the warm toast makes it sing.
~2 min - 06
Compose the plate
Lay the toast down. Arrange three langoustine halves on each slice. Spoon the hot brown butter over them — pour it generously, get those toasted bread corners too. Scatter parsley on top, grind black pepper, and finish with a tiny flick of sea salt.
~2 min
“Don't fuss. Langoustines are beautiful on their own — the flesh pale pink against the shell, the butter pooling underneath. Plonk the toast on a warm plate, lean the langoustines on top, and let the butter do the talking. If you're being fancy, wipe the plate rim; if you're being honest, you'll just be hungry. Serve immediately or everything goes cold and mean.”
First bite: sweet shellfish meat, a pinch of salt, the bread giving way. Middle: nutty butter hitting the back of the throat, lemon cutting through it all like a knife. Last mouthful: greed and the knowledge you've done something right. The langoustine is the star; everything else is just a chair for it to sit on.
Swap the langoustines for thick king oyster mushroom halves or sliced celeriac hearts — both have a meaty texture when pan-fried until golden. Cook them in olive oil until caramelised, then dress with the brown butter made from vegan butter (Flora or Naturli work fine). The lemon, parsley, salt, and pepper stay the same. You lose the shellfish sweetness, but you gain an earthiness that's honest and filling. Toast and plate exactly as written.
Dry, bright, mineral — matches the langoustine's sweetness without fighting the brown butter.
Something like Fyne Ales Jarl or Tempest Brewing — cuts through richness, refreshes between bites.
Floral, fizzy, and light. Lets the langoustine shine without any boozy distraction.
- ·Langoustines wilt fast. Buy them live, cook them the same day. Frozen ones taste like disappointment.
- ·Brown butter is forgiving up to a point, but the second it goes black it tastes like burnt tyres — watch it closely.
- ·If you can't find langoustines, use prawns or even hand-dived scallops. The method doesn't care; the butter does the work.
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