Napolyeon tort is a traditional cake consisting of layers of thin and flaky puff pastry and a rich and smooth pastry cream sandwiched between the layers. The layers are usually made with a combination of flour, salt, butter, white vinegar, a bit of vodka, and eggs, while the pastry cream usually consists of milk, egg yolks, sugar, and cornstarch.
Each baked layer is topped with pastry cream and a frosting made with a combination of butter, powdered sugar, vanilla, and heavy cream. The frosting is also added to the sides and top of the cake, which can be additionally decorated with cake sprinkles, berries, nuts, or chocolate shavings, if desired.