Flan, creme brulee and creme caramel are all custards with a caramelized sugar topping – crisp or flowing. These desserts are popular throughout Europe, Spanish-speaking countries and the U.S. The easiest of these similar desserts is a flan. Though you can make it in individual cups, a flan is very impressive when served as an upside-down pie. When you invert the dish, the caramelized sugar on the bottom flows over the top of the flan, creating a golden brown sauce. Be careful to avoid burning yourself with the hot, melted sugar.