A Belgian bun is a sweet yeast dough bun

Bun

A bun is a small, usually sweet, bread. Commonly they are hand-sized or smaller, domed in shape, with a flat bottom. A bun can also be a savory bread roll similar to a bap or barmcake....

, containing sultanas and usually topped with fondant icing and half a glace cherry. The bun is round or square shaped, with rounded off edges, making it similar in appearance to a Chelsea bun

Chelsea bun

The Chelsea bun is a type of currant bun that was first created in the 18th century at the Bun House in Chelsea, an establishment favoured by Hanoverian royalty and demolished in 1839. The bun is made of a rich yeast dough flavoured with lemon peel, cinnamon or a sweet spice mixture...

. It is also sometimes served with cream. No firm link has so far been established between the bun and Belgium

Belgium

Belgium , officially the Kingdom of Belgium, is a federal state in Western Europe. It is a founding member of the European Union and hosts the EU's headquarters, and those of several other major international organisations such as NATO.Belgium is also a member of, or affiliated to, many...

; however, that country does produce as one of its specialities a very similar pastry (though with less icing) known as a couque suisse

Couque suisse

A couque suisse is a pastry, more accurately a viennoiserie-style semi-sweet bread, somewhat similar to a Danish pastry. Couques suisses are available internationally, for example at Le Pain Quotidien bakeries throughout the world. They are also similar to Belgian buns....

.