£7.50
When the staff at Soho taqueria Corazon tell you this one’s big enough for two, they ain’t kidding. An edible Everest of sponge cake, homemade goat’s-milk caramel, vanilla ice cream, whipped cream and marshmallow cream, it remains the only iced dessert that has ever defeated us. It’s a force for good too: £1 from the price of each sundae goes to a programme promoting literacy in Mexico City primary schools. Think of it as the world’s most delicious charity fun run.