Also known as a madeleine tin, this is a small steep-sided metal mould about 8cm (3.2in) tall, with flared sides (narrower at the bottom than at the top). It's used for individual servings of all kinds of sweet or savoury dishes including pastries, mousses, jellies, timbales or portions of rice or potatoes. Castle pudding is a classic dessert that's always made in a dariole mould.