FranceLobster Thermidor
Lobster Thermidor is a truly luxurious dish with a rich creamy and cheesy sauce. Brandy gives the sauce an exquisite flavor and mustard adds a savory note. Baked with a crispy cheese crust.
Key Ingredients
What you'll need
Ingredients
- 2 largeSee recipes with lobsters
lobsters (about 1.5 kg total)
i - 60 gSee recipes with butter
butter
i - 1See recipes with onion
onion, finely chopped
i - 200 gSee recipes with mushrooms
mushrooms, chopped
i - 2 tbsp
- 1 cupSee recipes with dry white wine
dry white wine
i - 1 cup
- 2See recipes with egg yolks
egg yolks
i - 2 tbspSee recipes with brandy or cognac
brandy or cognac
i - 1 tbspSee recipes with dijon mustard
Dijon mustard
i - 1/2 cupSee recipes with gruyère cheese
Gruyère cheese, grated
i - to tasteSee recipes with salt and pepper
salt and pepper
i
How to make it
Instructions
- 1
Boil the lobsters in salted water for 8-10 minutes. Cool, remove the flesh from the shell and cut into large chunks.
- 2
In a frying pan, melt butter over medium heat. Fry the onion and mushrooms until soft, about 5 minutes. Sprinkle with flour and fry for another 2 minutes, stirring.
- 3
Pour in the wine and cream. Bring to a boil, reduce heat and simmer for about 5 minutes until the sauce thickens slightly.
- 4
Mix the egg yolks and brandy in a separate bowl. Add a little of the hot sauce to warm the egg mixture, then pour it back into the sauce, stirring. Add mustard, Gruyère cheese, salt and pepper. Stir until the cheese is dissolved.
- 5
Place the lobster pieces in the pan with the sauce and stir gently. Transfer to heatproof shells or molds, sprinkle with remaining cheese. Bake in a preheated 200°C oven for 10-15 minutes until the cheese is melted and browned. Serve hot, garnished with fresh parsley.
Frequently Asked Questions
Can lobster thermidor be made without a live lobster — what to use instead of a whole lobster?
The classic recipe calls for a live or freshly cooked lobster split in half. Substitutes: frozen lobster tails (the closest option), langoustine, large crab claws, or jumbo tiger shrimp. The flavor will differ, but the thermidor sauce (cream, mustard, cognac, cheese) dominates and elevates any seafood to restaurant quality.
How to make a proper thermidor sauce — what is the secret to a creamy texture without curdling?
The sauce curdles when cold cream or cheese is added to an overly hot base. Cook over medium heat: first sauté the shallots, add cognac and reduce, then pour in the cream and simmer until thickened. Add mustard and grated Gruyère at the very end, off the heat. Under the broiler the cheese will melt and form a golden crust.
What can replace cognac in lobster thermidor — can it be made without alcohol?
Cognac adds depth and aroma. Substitutes: brandy, Calvados, or dry sherry in the same amount. For an alcohol-free version: fish or chicken stock + 1 tsp apple cider vinegar + a pinch of smoked paprika. The flavor will be less complex, but the sauce will still be delicious.
How long to broil lobster thermidor — at what temperature and how to avoid drying it out?
The filling (lobster meat + sauce) is already cooked, so the broiler is only needed to melt and brown the cheese: 3–5 minutes under maximum broiler heat (230–250°C). Keep it close to the top heating element. As soon as the cheese is golden and bubbling — the dish is ready. No longer is needed.
What to serve with lobster thermidor — classic French accompaniments?
Traditional French sides: steamed rice or rice pilaf, asparagus with hollandaise, green salad with vinaigrette, crusty baguette. Also classic: buttery mashed potatoes or blanched green beans. A white Burgundy (Chardonnay) or Chablis is the ideal wine pairing.
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