This traditional Spanish Christmas treat celebrates epiphany and the journey of los reyes magos (the three kings). It’s shaped like a halo and we often hide a figure of the baby Jesus inside, much as the Brits hide coins in Christmas pudding. Sometimes, there’s a dried fava bean in there, too, but beware: if you find it, you have to make the roscón next year! This is great served with thick Spanish hot chocolate.