A steaming black pot of mussels cooked with celery, onion and white wine, served with a cone of crisp frites and mayonnaise. The Belgian national plate, at its best on the North Sea coast.
Where to eat it: 10 restaurants across 3 cities.
Mussels and frites became the everyday Belgian feast in the 19th and 20th centuries, when cheap, abundant mussels from the North Sea and Zeeland beds met the country's frites obsession. Mussel season runs from summer into winter, marked on menus across Bruges. The classic preparation, moules nature, steams them with aromatics and white wine, though kitchens also offer them in cream, beer or garlic. Breydel-De Coninck on Breidelstraat built its reputation on seven mussel preparations, all served with frites.
Common allergens: Shellfish, Gluten, Egg
Tip from the editors. Use the empty shell of the first mussel as tongs to pull the rest from their shells, the Belgian way.
Breydel-De Coninck on Breidelstraat in Bruges is the mussel and eel house with the strongest reputation in town. Seven mussel preparations, all with frites.
Signature: Moules-frites, Eel in green sauce
Order: A casserole of mussels with frites, or paling in 't groen when eel is in season.
Tip: On the busy Breidelstraat tourist run, but locals rate the mussels. Cash and card both fine.
Cambrinus on Philipstockstraat near the Burg in Bruges is a beer brasserie with a 400-strong list and a full Flemish kitchen of beer-braised classics.
Signature drink: 400 beers, Flemish plates
Food: Flemish brasserie kitchen
Order: A stoofvlees cooked in dark Belgian ale, with a matching abbey beer from the list.
Tip: Open daily, kitchen and bar both. The list is bound like a book; take your time with it.
Pieter Pourbus in Bruges fills a 1561 house once home to the Flemish Primitive painter, cooking traditional Flemish food strong on grilled and braised meats.
Signature: Flemish meat dishes, Traditional plates
Order: A Flemish meat plate; the kitchen leans classical.
Tip: Dinner Friday to Tuesday plus Sunday lunch; closed Wednesday and Thursday. The historic house is the draw.
Chez Leon in Brussels has run on Rue des Bouchers since 1893 and keeps the kitchen open until 23:00 every night. The mussels arrive in a black pot.
Try: Moules-frites
Aux Armes de Bruxelles in Brussels keeps the kitchen open until 22:30 every night. At Rue des Bouchers 13. Booking recommended. Reservations advised.
Try: Waterzooi and croquettes
Volle Gas in Brussels' Ixelles is a 1924 Art Deco brasserie on Place Fernand Cocq. Kitchen leans belgian brasserie. At Place Fernand Cocq 21.
Signature: Mussels, Carbonnade flamande
Order: Whichever mussel preparation looks new on the chalkboard, with frites and a Tripel Karmeliet.
Tip: Open seven days, kitchen runs late. The Art Deco interior is the seat; book the corner banquette.
Au Vieux Saint Martin in Brussels' Sablon runs a continuous service from noon to midnight, every day. Filet americain prepared at the table.
Try: Filet americain
Aux Moules de Lille works Place Rihour in Lille as a mussels-and-frites brasserie, with oysters, prawns and seafood platters alongside the pots.
Signature: Moules-frites, Plateau de fruits de mer
Order: Moules-frites, which is the reason the room exists.
Tip: Mussels are best from September onward. The kitchen also runs daily specials and a vegetarian plate.
La Chicorée on Place Rihour in Lille serves regional brasserie food until 04:30 on weeknights and 06:00 at weekends, across three full floors.
Try: Moules-frites and welsh
Tip: This is the only serious kitchen in Lille still cooking at 04:00. Expect a crowd from the clubs.
Le Lys occupies a historic cafe facing the Grand-Place in Lille, a brasserie of carbonade, moules-frites and waterzoï with regional beer to match.
Signature: Carbonade flamande, Waterzoï
Order: Waterzoï, the creamy Flemish stew you rarely see on Grand-Place cards.
Tip: Waffles and pancakes run all afternoon, which makes the terrace useful between services.
More cities are in research. Want moules-frites covered somewhere specific? Tell us where you want to eat.