Bowl of creamy shellfish bisque with a cream swirl and chives

Bisque Guide: What Makes a Bisque, and How to Serve One

Published 12 Oct 20268 min read

A bisque is a smooth, rich French soup made from shellfish, and what sets it apart is that the shells do the work. A classic bisque browns the shells, cooks them into the liquid, grinds them for flavor and color, then strains the soup smooth and finishes it with cream. Its color and its taste both come from the shellfish it is made from. This guide covers how a bisque is built, how it differs from a chowder, a velouté and a cream soup, and how to warm and finish a jarred bisque at home. Shop the soups collection to browse jarred soups.

Where the word comes from

The Online Etymology Dictionary traces "bisque" to a French word recorded in the 1620s for a kind of rich stew, and calls its origin uncertain. The word reached English in the 1640s as "bisk," at first meaning a soup pot, and the modern spelling was in use by 1731. One old theory links it to "biscuit," on the idea that the ingredients were cooked more than once. By the 1650s the English word meant a thickened stew, and the sense of a smooth, pureed soup developed in the mid-1800s.

What makes a soup a bisque

A culinary textbook by Amelie Zeringue and William R. Thibodeaux of Nicholls State University defines a bisque as a smooth, creamy, highly seasoned soup of French origin, classically based on a strained broth of crustaceans. Crustaceans are shellfish with hard, jointed outer shells: lobster, crab, shrimp and crayfish. The textbook calls that strained broth a coulis, a French cooking word for a smooth, strained liquid or puree. The textbook builds that soup in four main steps.

1. The shells are browned

The Culinary Institute of America (CIA), a not-for-profit cooking college with campuses in New York, California and Texas, explains that traditional bisques get their color and flavor from shrimp, lobster, crab or crayfish shells, and that the shells are browned in fat until they turn bright pink or red. That color change has a known cause. A University of Manchester team led by Professor John Helliwell reported in April 2015 that the orange-red color of a cooked lobster comes from a pigment called astaxanthin. In the live animal, astaxanthin is bound to shell proteins called crustacyanin, and that pairing looks dark blue. Heat denatures the protein, meaning it unfolds and loses its shape, the astaxanthin is released, and it returns to its orange-red state. For the chemistry of what heat does to food as it browns, see the browning guide.

2. Vegetables, tomato and a splash of alcohol go in

The Nicholls State textbook has the cook caramelize mirepoix and the main ingredient in fat, then add a tomato product and deglaze with alcohol. Mirepoix is the French name for a base of chopped onion, carrot and celery. To deglaze is to pour liquid into a hot pan so it lifts the browned bits stuck to the bottom, which carry much of the flavor. Stock, a liquid made by simmering bones, shells or vegetables in water, goes in next, and the whole pot simmers.

3. The soup is thickened and the shells are ground into it

The textbook notes that in an authentic bisque, the shells are ground to a fine paste and added to thicken the soup. The traditional thickener is cooked rice: the textbook states that traditional bisques are shellfish soups thickened with cooked rice, and that many bisques today, generally made from shrimp, lobster or crawfish, are thickened with a roux instead of rice for better stability and consistency. A roux is flour cooked in fat, the same base used in gravy. The Culinary Institute of America describes both options and calls rice the more traditional one. After thickening, the soup is pureed and strained, and the CIA notes that pulverizing the shells and pureeing the vegetables helps release more flavor into the soup.

4. Cream or butter finishes it

The last step is enrichment. The textbook finishes a bisque with hot cream or cold compound butter, which is butter with flavorings worked into it. The CIA's rule is that the cream should enrich and smooth the soup without masking the main ingredient. The CIA also describes the texture to aim for: all bisques are slightly coarse or grainy, with a consistency similar to heavy cream. A faint grain is part of the dish.

The CIA notes one more detail that helps when reading a soup's color. A crustacean bisque, made from lobster, crab, shrimp or crayfish, is pale pink or red, while a bisque made from other shellfish is ivory. The textbook adds that the word "bisque" is also commonly used today for cream-based soups with no seafood in them, such as tomato bisque.

Bisque, velouté, cream soup and chowder

These four soups are all thick, and several of them use cream, which is why they get confused. The Nicholls State textbook divides thick soups into two families: cream soups, thickened with roux or another starch, and puree soups, thickened by the pureed main ingredient itself. A velouté, French for "velvety," starts from velouté sauce, which the textbook defines as a light stock thickened with roux. In the classic system of Auguste Escoffier, the 19th-century French chef who listed the five "mother sauces" of French cooking, a velouté soup is finished with a liaison of egg yolks and cream. A liaison is a mix of yolks and cream stirred in at the end to thicken and enrich. The textbook says most cream soups today use velouté as a base and are finished with milk or cream instead of a liaison. Chowders, the textbook says, are hearty soups with chunks of the main ingredients, including, virtually always, diced potatoes. They are usually thickened with roux and usually contain milk or cream, with exceptions such as Manhattan clam chowder. The key difference is that a chowder is not pureed and strained before the cream is added.

Soup	Base	Thickener	Texture	Finish
Bisque	Stock cooked with browned crustacean shells, mirepoix and tomato	Cooked rice (traditional) or roux (modern), plus ground shells	Pureed and strained; like heavy cream, with a faint grain	Hot cream or cold compound butter
Velouté soup	Velouté sauce: light stock and roux	Roux	Smooth and velvety	Classically a liaison of egg yolks and cream
Cream soup	Usually velouté (classically a thin béchamel, a milk sauce thickened with roux)	Roux or another starch	Smooth	Milk or cream
Chowder	Chunks of the main ingredients, virtually always including diced potatoes	Usually roux	Chunky; not pureed and strained	Milk or cream, with exceptions such as Manhattan clam chowder

Read across the rows and the bisque stands out on two counts: it is the only one built on shells, and the only one where the shells end up inside the soup before it is strained. A crab chowder and a crab bisque can share an ingredient and still be completely different soups, one a bowl of chunks and one a smooth, shell-colored cream.

A bisque from Le Touquet

Maison Pérard makes its soups in Le Touquet, a town in the Hauts-de-France region of northern France. The company's own history credits Serge Pérard, who during the Second World War gathered pieces of fish at the port of Boulogne-sur-Mer and made a hearty soup from them. He later refined the recipe, adding pure saffron, and put it on the menu of the all-seafood restaurant he opened in Le Touquet in the 1960s. The company says the success was immediate. Customers asked to take the soup home, so Pérard set up a canning workshop. The company was sold in September 2020 and a new management team was put in place. In May 2021 the regional paper La Gazette reported that Anne-Sophie Allouchery had taken over as head of Maison Pérard in September 2020, and that the company produced more than 500,000 jars of seafood soups a year. Maison Pérard says its fish soup was the first fish soup to receive the Label Rouge, a French certification of superior quality, which it earned in 2010.

Maison Pérard describes its lobster bisque as a refined recipe prepared with first-choice ingredients, and suggests serving it in verrines at the apéritif, to share among friends, or at dinner (shop Maison Pérard Lobster Bisque). A verrine is a small glass used to serve a few spoonfuls of a dish, and the apéritif is the French hour of drinks and small bites before a meal. The company names its crab version a soup rather than a bisque and calls it a fine recipe for people looking for new flavors (shop Maison Pérard Crab Soup). Both come in 780 gram jars, about 27.5 ounces by weight.

How to serve a bisque from a jar

A jarred bisque has already been through every step above. What is left is warming it and adding the finish. Maison Pérard labels its lobster bisque sterilized and says to keep it at room temperature. The USDA Food Safety and Inspection Service explains the canning process behind that label: food is placed in airtight, vacuum-sealed containers and heat processed at 250°F (121°C), which destroys microorganisms and inactivates enzymes, natural proteins that speed up chemical changes in food. Because the food in the container is commercially sterile, meaning free of microbes that could grow at room temperature, it does not spoil. Sealing food and then heating it is an old idea, and the history of how tinned fish was invented traces where it began.

Check the lid. The USDA says never to use food from cracked jars or jars with loose or bulging lids, and to discard any container that spurts liquid when opened, without tasting it.
Shake before opening. Maison Pérard's first instruction for both soups is to shake the jar well before opening it.
Warm it gently. The maker says to reheat over low heat and serve the soup very hot.
Add the finish. For the crab soup, Maison Pérard suggests a teaspoon of cream at serving, plus a few croutons, small cubes of crisped bread. For the lobster bisque, it suggests stirring in a few fried croutons just before eating.
Refrigerate what is left. The maker says to keep an opened jar in the refrigerator and finish it within 24 hours. The USDA adds that leftovers keep better moved to a clean glass or plastic container.

Three ways to serve the lobster bisque

In small glasses at the apéritif. Maison Pérard's own suggestion: serve it in verrines before the meal, a few spoonfuls per glass.
To share among friends. The maker names sharing among friends as another way to serve it.
At dinner. The maker also lists dinner. Served in bowls with bread, it makes a simple meal.

The Nicholls State textbook notes that a seafood bisque is traditionally served in a low two-handled cup on a saucer or in a mug, and is traditionally not garnished with actual seafood. That tradition makes sense once the method is clear. A bisque's seafood is already in the soup, in its color and in its taste, because the shells were cooked and ground into it.

The textbook describes bisque as a method of extracting flavor from imperfect crustaceans not good enough to send to market. That origin explains every step above. A bisque was built to get the most out of the part of the animal that could not be sold, and the shell, browned, ground and strained, is still where the soup's color and depth come from.

For a crab note without cooking shells, a tin of La Mar de Tazones Spider Crab Meat holds hand-shredded crab and spider crab from the body, legs and roe, packed only with water and salt.