Tested till perfect Lobster Thermidor
Lobster Thermidor
Photography by Matthew Kimura

Lobster Thermidor

This dish is thought to have been created in 1894 by Chez Marie, a Paris restaurant, for the opening of Victorien Sardou's play Thermidor. Others say it was first tasted by Napoleon during Thermidor, the 11th month of the calendar invented during the French Revolution.

By The Canadian Living Test Kitchen

Source: Canadian Living Magazine: February 2008

Recipe3 out of 5 based on 10 ratings.
  • rating starrating starrating starrating starrating star
  • Portion size 2


  • 2 2live lobsterlobsters, (1-1/2 lb/750 g each)
  • 1 tbsp 1tbspminced fresh chives

Bechamel Sauce:

  • 2 tbsp 2tbspbutter
  • 1 1small oniononions, diced
  • 1 1stalk celery, diced
  • 2 tbsp 2tbspall-purpose flour
  • 3/4 cup 3/4cupmilk
  • 1/4 cup 1/4cupclam juice
  • 1 tbsp 1tbspsherry
  • 1/4 tsp 1/4tspsalt
  • 1/4 tsp 1/4tspwhite pepper
  • 1 pinch 1pinchground mace or ground nutmeg
To change the number of servings, enter the number, then press "calculate". or reset


1.  Fill large deep pot with enough salted water (1 tbsp/15 mL salt per 4 cups/1 L water) to completely cover lobsters; bring to full rolling boil. Grasp back of each lobster; plunge headfirst into water. Cover and return to boil.

Reduce to bubbly simmer; cook for 10 minutes or until lobster is bright red and small leg comes away easily when twisted and pulled. Remove from water; let cool.

2.  Halve lobsters lengthwise. Twist off claws at joint at body; separate into claw and arm sections. Break off small part of claw and remove meat. Crack large part of claw at widest part; lift out meat. Crack arm; pick out meat and set aside. Discard claw shells.

3 Remove meat from bodies; cut into 1/2-inch (1 cm) chunks. If any, remove coral (roe or eggs) to small bowl.

Scrape shells' insides clean, discarding green tomalley and sand sac (behind eyes). Set on foil-lined rimmed baking sheet; spoon in lobster meat. (Make-ahead: Cover and refrigerate lobsters and coral separately for up to 2 hours.)

4.  Bechamel Sauce: In small saucepan, melt butter over medium heat; fry onion and celery for 6 minutes or until softened. Sprinkle with flour; cook, stirring, for 1 minute. Whisk in milk, clam juice, sherry, salt, pepper and mace; bring to boil. Reduce heat to medium; cook, stirring, for 2 minutes or until thickened. Whisk in coral (if any); cook for 1 minute. Strain through fine sieve into small bowl. (Make-ahead: Cover and set aside for up to 30 minutes; reheat.)

5.  Cover lobster meat with sauce. Bake in 450°F (230°C) oven for about 14 minutes or until golden and bubbly. Sprinkle with chives.

Additional information : Tips: Coral, or roe or eggs, appears as a long reddish line in female lobsters. It adds a nice rosy colour to the sauce and is considered by many to be a delicacy. Ask your fishmonger for at least one female lobster.

To save you time, many fish markets will cook the lobster for you.

Nutritional Information Per serving: about

cal 376 pro 41g total fat 15g sat. fat 9g
carb 17g fibre 0 chol 165mg sodium 1,156mg

% RDI:

calcium 22 iron 10 vit A 21 vit C 5
folate 21
All rights reserved. TVA Group Inc. 2015