Gesztenye szelet is a traditional cake originating from Hungary, where it's a coffeehouse staple. The cake is usually made with a combination of chestnut purée, eggs, sugar, vanilla extract, flour, salt, brandy, heavy cream, and dark chocolate.

The eggs are mixed with sugar over a pot of simmering water until it's tripled in volume, light, and fluffy. Chestnut purée, vanilla, salt, and flour are folded in, and the batter is spread evenly in a greased baking pan. The cake is baked until golden, and then left to cool.

It's brushed with a syrup consisting of water, sugar, and brandy. The cake is topped with a mixture of chestnut purée, sugar, vanilla, and heavy cream, while dark chocolate is grated over the top. Once chilled, the cake is cut into rectangles and it's ready to be enjoyed.