Puff pastry dough looks like a pie dough, but it’s actually many layers of dough separated by equally thin layers of butter, and this golden flaky pastry "puffs" into layers due to the water in the dough layers and water in the butter which turns into steam. It is sold in the grocery store in sheets in the frozen food section and can be made from scratch (but is very labor intensive) to be used to create exciting appetizers, entrees, and desserts.