Equipment
* optional
Ingredients
Lobster & Fat
- 500 g lobster shells and bodies, broken into smaller pieces
- 50 g unsalted butter
Aromatics
- 100 g shallots, roughly chopped
- 100 g carrots, roughly chopped
- 100 g celery, roughly chopped
- 15 g garlic, smashed
- 30 g tomato paste
Liquids & Herbs
- 120 ml dry white wine
- 1500 ml water, cold
- 5 g fresh tarragon
- 5 g fresh thyme
- 3 g black peppercorns, whole
- 1 bay leaf, dried
Nutrition (per serving)
Nutrition is estimated per serving. Nutrients without complete source data are omitted.
Full nutrition
- Calories
- 262 kcal
- Protein
- 23 g
- Carbohydrates
- 12 g
- Fat
- 11 g
- Fiber
- 3 g
- Sugar
- 5 g
- Sodium
- 587 mg
- Saturated Fat
- 7 g
- Trans Fat
- 0 g
- Monounsaturated Fat
- 3 g
- Polyunsaturated Fat
- 1 g
- Cholesterol
- 186 mg
- Potassium
- 652 mg
- Calcium
- 180 mg
- Iron
- 1.9 mg
- Magnesium
- 78 mg
- Phosphorus
- 254 mg
- Zinc
- 4.8 mg
- Vitamin A
- 313 mcg
- Vitamin C
- 10 mg
- Vitamin E
- 1.6 mg
- Vitamin K
- 13 mcg
- Vitamin B6
- 0.3 mg
- Vitamin B12
- 1.6 mcg
- Thiamin
- 0.08 mg
- Riboflavin
- 0.07 mg
- Niacin
- 2.5 mg
- Folate
- 37 mcg
- Water
- 579 g
- Alcohol
- 3 g
Sources: Aggregated Public Data, USDA FoodData Central
Method
Preheat the oven to 200°C/400°F to prepare for roasting the shells.
Spread the lobster shells and bodies evenly on a baking sheet. Roast in the preheated oven until the shells are fragrant, dry, and lightly browned, taking about 15 minutes.
Melt the unsalted butter in a large stockpot over medium heat. Add the chopped shallots, carrots, celery, and smashed garlic. Sweat the vegetables until softened but not browned, stirring occasionally with a wooden spoon for about 5 minutes.
Stir the tomato paste into the softened vegetables. Cook until the paste turns a deep rust color and coats the bottom of the pot, roughly 2 minutes.
Pour the dry white wine into the pot to deglaze, scraping up any caramelized bits from the bottom. Simmer until the wine has almost completely evaporated.
Add the roasted lobster shells to the stockpot. Pour in the cold water and toss in the fresh tarragon, fresh thyme, whole black peppercorns, and bay leaf. Bring the liquid to a gentle simmer at around 85°C/185°F.
Maintain a very gentle simmer for 45 minutes, using a spoon or ladle to skim off any foam or impurities that rise to the surface. Do not allow the stock to reach a rolling boil to prevent it from becoming cloudy.
Carefully pour the contents of the pot through a fine mesh sieve lined with cheesecloth into a large clean bowl. Press gently on the solids with the back of a wooden spoon to extract the flavorful juices, but do not mash them.
Cool the strained stock quickly by placing the bowl in an ice bath. Once chilled to room temperature, transfer the stock to storage containers.
Chef's Notes
- Roasting the lobster shells before making the stock triggers the Maillard reaction, developing a deep, complex flavor profile while eliminating any raw fishy aromas.
- Always start stocks with cold water. This encourages proteins to coagulate slowly and float to the surface, making them easier to skim off for a crystal-clear result.
- Tomato paste not only adds umami and depth, but when caramelized gently in fat, it imparts a beautiful vibrant orange-red hue characteristic of classic lobster bisques and sauces.
- The combination of butter, shallots, tarragon, and thyme pays homage to classic French flavor profiles, bridging the gap between delicate seafood and rich, savory notes.
Storage
Refrigerator: 4 days — Store in an airtight container. The fat cap on top will help preserve the liquid beneath.
Freezer: 6 months — Freeze in ice cube trays or portioned containers for easy use in sauces and soups.
Reheating: Warm gently in a saucepan over medium heat until completely liquid and steaming.
Troubleshooting
The stock is cloudy or greasy
Cause: The stock boiled too vigorously, causing fats and impurities to emulsify into the liquid
Fix: Chill the stock completely and peel off the solid fat cap; for severe cloudiness, an egg white raft can be used to clarify it
Prevention: Maintain a gentle, lazy simmer and do not stir the pot once the ingredients are submerged
The stock has a bitter or chalky aftertaste
Cause: The seafood shells were simmered for too long, extracting bitter calcium compounds
Fix: Cannot be fixed, but sweetness from heavy cream or additional wine reduction in a finished sauce can help mask minor bitterness
Prevention: Never simmer crustacean shells for longer than 45 to 60 minutes
The flavor is too weak or watery
Cause: Too much water was added initially, or the stock was not reduced enough
Fix: Return the strained stock to the stove and simmer uncovered to reduce and concentrate the flavor
Prevention: Use the exact ratio of water to shells, ensuring shells are just barely covered
Cultural Context
In classical French culinary tradition, extracting maximum flavor from every part of an ingredient is a sign of respect and refined technique. A crustacean fumet or stock forms the indispensable foundation for luxurious dishes, such as bisque and complex seafood reductions, elevating kitchen scraps into liquid gold.
