White truffle cake is typically made with a combination of white chocolate, heavy cream, butter, and white truffles. The white chocolate is melted and combined with the heavy cream and butter to create a rich, creamy ganache. The white truffles are then shaved into thin slices and folded into the ganache. White truffle cake is a dessert for true connoisseurs, as the high cost of white truffles makes it a rare and exclusive treat. It is a decadent and indulgent dessert that is sure to impress anyone who tries it.