Puff pastry is a versatile and flaky pastry that is commonly used in both sweet and savory dishes. It is made by layering butter between multiple layers of dough, which creates a light and airy texture when baked. Puff pastry can be filled with sweet fillings like fruits, custards, or chocolate, as well as savory fillings such as cheese, vegetables, or meat. It is also often used to make appetizers like palmiers, cheese straws, or sausage rolls. Puff pastry can be bought pre-made in the frozen section of the grocery store or made from scratch using flour, butter, and water.