Ever had a palmier? A flaky turnover filled with jam? A bite of puff pastry topped with mushrooms at a fancy cocktail party? All these delicious treats start right here, with this dough. Yes, you can buy puff pastry at the store, but if you're in the mood for a real baking project, you can make it yourself at home. From such simple ingredients — flour, water, butter — greatness comes. Here's everything you need to know to make puff pastry from scratch.