Lobster base substitutes

This is what lobster base is trying to imitate, and it is better than the jar. Save shells from any shrimp, lobster, crab or langoustine you have eaten, keep them in the freezer, then roast them for ten minutes and simmer in water with an onion, a carrot and a bay leaf for 25 minutes. You get the sweet, briny, faintly nutty shellfish flavour the base provides, plus a light body from the shells, and you control the salt completely.

Best for

lobster bisque, seafood pasta, risotto, chowder, paella

Do not simmer shells longer than about 40 minutes. Past that point shellfish stock turns bitter and metallic rather than sweeter.

The nearest jarred alternative and almost always cheaper and easier to find. Shrimp base reads sweeter and sharper, with a more insistent iodine edge that can dominate a delicate bisque. Crab base is muddier and less sweet, with a slightly muskier finish, which suits a chowder better than a refined soup. Both give you the pink-orange tint and the salt, so treat them as interchangeable and adjust sweetness with a quarter teaspoon of sugar per cup if the dish tastes hollow.

Best for

bisque, seafood chowder, shellfish risotto, sauces, gumbo

Bases are very salty. Dissolve, taste, then decide about salt. Never salt a bisque before it is finished reducing.

Widely stocked and completely usable, but the difference is real. Fish base tastes savoury and marine where lobster base tastes sweet and marine, and it lacks the almost buttery roundness that makes a bisque taste like lobster. It is also paler, so your soup comes out beige rather than blush. The sugar and sherry are not optional garnish here; they are what pushes it toward the crustacean side.

Best for

bisque, seafood soups, sauces, poached fish

Use a light fish base rather than anything smoked or anchovy-based, which will take the dish somewhere else entirely.

The most reliable supermarket option, sitting near the canned tuna. It brings genuine shellfish salinity and a clean mineral tang, but it is a very different flavour: sharply briny and oceanic where lobster is sweet and mellow, with no sweetness at all. It is also extremely salty, which is why you cut it with water. Good in chowder and seafood pasta, a little harsh in a delicate bisque unless you add cream.

Best for

clam and seafood chowder, seafood pasta, steaming mussels, risotto

Add no salt at all until the dish is finished. A quarter teaspoon of sugar per cup softens the sharpness noticeably.

The pantry rescue, and the only one on this list that is safe for a shellfish allergy. Be honest with yourself about what it delivers: chicken stock gives body and savoury depth, tomato paste gives the orange colour and a glutamate lift, sherry gives the boozy aromatic note that people actually associate with bisque, and Old Bay gives a seafood-seasoning suggestion. The result is a genuinely delicious soup. It does not taste like lobster.

Best for

bisque-style soups, shellfish allergies, creamy seafood-free soups, sauces

Fry the tomato paste in a little butter for a minute before adding the stock. Raw paste tastes tinny and stays that way.

A useful route for a lighter, cleaner seafood soup and the closest thing to a pescatarian or near-vegetarian version. Kombu gives real oceanic minerality and a lot of savoury depth, and a few drops of fish sauce adds the animal note it is missing. What you do not get is sweetness, fat or any pink colour, so the finished soup is pale and lean. Leave out the fish sauce and add a pinch of MSG for a fully vegan version.

Best for

light seafood broths, noodle soups, steamed fish, vegetarian adaptations

Steep the kombu in water below a simmer for 20 minutes and pull it out before it boils, or the broth turns slimy and bitter.