Flan: Sweet custard with a caramel topping. Pudding. Vanilla flavor. Crème caramel, known as flan in the US and Spanish speaking countries, and caramel custard in UK. It's a kind of rich custard dessert with a layer of soft caramel on top, where some caramel syrup is poured into the mold before adding the custard base. After the custard has set, it can be turned out, leaving a caramel sauce.