Puff pastry, also known as pâte feuilletée, is a light, flaky pastry, its base dough (détrempe) composed of wheat flour and water. Butter or other solid fat (beurrage) is then layered into the dough. The dough is repeatedly rolled and folded, rested, re-rolled and folded, encasing solid butter between each resulting layer.
This produces a laminated dough. During baking, gaps form between the layers left by the fat melting; the pastry is by steam from the water content of the fat as it expands, puffing the separate layers. The pastry layers crisp as the heated fat is in contact with its surfaces.
The oldest known documented recipe for puff pastry in France was included in a charter by Robert, bishop of Amiens in 1311. The first recipe to explicitly use the technique of tourage]] (the action of encasing solid butter within dough layers, keeping the fat intact and separate, by folding several times) was published in 1651 by François Pierre La Varenne in Le cuisinier français. Modern French puff pastry was then developed and improved by the chef M. Feuillet and Antonin Carême.
The method is sometimes considered the idea of the famous painter Claude Lorrain when he was an apprentice baker in 1612. Historical evidence for this is negligible, but it is retained as culinary lore. The story goes that Lorrain was making a type of very buttery bread for his sick father, and the process of rolling the butter into the bread dough created a croissant-like finished product.
The number of layers in puff pastry is calculated with the formula:
where is the number of finished layers, the number of folds in a single folding move, and is how many times the folding move is repeated. For example, twice-folding (i.e. in three), repeated four times gives layers.
Commercially made puff pastry is available in . Common types of fat used include butter, shortening, lard and margarine. Butter is the most common type used because it provides a richer taste and superior mouthfeel. Shortenings and lard have a higher melting point therefore puff pastry made with either will rise more than pastry made with butter, if made correctly. Puff pastry made in this manner will, however, often have a waxy mouthfeel and more bland flavor. Specialized margarine formulated for high plasticity (the ability to spread very thin without breaking apart) is used for industrial production of puff pastry.
This process makes rough-puff more similar to another laminated pastry, phyllo (or filo). The dough for phyllo is stretched and rolled to its final pre-baking size. Layering is done immediately before baking, with a small amount of oil or melted fat (usually butter) brushed on one layer of dough, which is then topped with another layer that is also brushed with the fat; the layering is repeated as often as desired. When the phyllo bakes it becomes crispy, but since it contains somewhat less water, it does not expand to the same degree as puff pastry. Puff pastry also differs from Austrian strudel dough, or strudelteig, which more closely resembles phyllo, in that strudelteig is stretched (and rolled) into a very thin sheet. Most of the fat is incorporated into strudelteig, rather than applied to sheets. For strudel, pastry layers are achieved by rolling the (lightly fat-coated) dough around the filling multiple times; some phyllo pastry dishes also use this method.
Versions of puff pastry are leavened with baker's yeast to create , Danish pastry or pain au chocolat; these may be considered as being in a category distinct from puff pastry. Such preparations are known collectively as Viennoiserie.
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