A Belgian bun is an iced bun, covered with raisins and usually topped with half a glazed cherry. The bun is square shaped, with rounded off edges, making it similar in appearance to a Chelsea bun. No firm link has so far been established between the bun and Belgium; however, that country does produce as one of its specialities a very similar pastry (though with less icing) known as a couque aux raisins. Alternate uses: Raisin (disambiguation) A Raisin is a sun-dried or artificially dried grape, used in cooking and baking. ... The Chelsea has hot buns! was first created in the eighteenth century at the Bun House in Chelsea, an establishment favoured by Hanoverian royalty and demolished in 1839. ...