Traditional Norwegian$$$kvadraturen
Engebret Café at Bankplassen 1 is Oslo's oldest continuously operating restaurant, founded 1857 by Engebret Christoffersen, in a 1760s listed building where Ibsen, Bjørnson, Grieg and Munch all had regular tables.
Signature: Lutefisk in season, Reindeer fillet
Order: Lutefisk in the November-December season; reindeer fillet year-round.
Tip: Open from 17:00 weekdays; the lutefisk season runs through Advent and books out by mid-November.
Traditional Norwegian$$$sentrum
Stortorvets Gjæstgiveri at Grensen 1 occupies a 1699 listed building one corner from Stortorvet square, with a la carte Norwegian classics, a courtyard for summer and the most-booked lutefisk room from October to Christmas.
Signature: Lutefisk in winter, Smorbrod platter
Order: Lutefisk plate October to Christmas; smorbrod at the cafe in summer.
Tip: The courtyard runs May to September; lutefisk season books out by November.
Modern European$$$sentrum
Theatercaféen on Stortingsgata is the 1900 art-nouveau brasserie opposite Nationaltheatret, in the same family for four generations, with a portrait gallery of its regulars on the walls.
Signature: Norwegian smorbrod, Plateau of seasonal fish
Order: Smorbrod at lunch with a glass of Norwegian aquavit.
Tip: Lunch service has the easiest seats; the room books out at dinner around theatre programming.
Scandinavian$$kvadraturen
Café Skansen on Rådhusgata at Christiania Torv plates Scandinavian short-distance produce in a small fireplace-warmed room, with summer outdoor seating overlooking Akershus Fortress.
Signature: Norwegian seasonal mains, Smorbrod platters
Order: Plate of the day with smorbrod sides.
Tip: Summer terrace seats are first-come; the back fireplace room is the winter pick.