Choux pastry, or (), is a delicate pastry dough used in many pastries. Basic ingredients usually only include butter, water, flour and eggs (auxiliary ingredients and flavorings are also added). Instead of a raising agent, choux pastry employs its high moisture content to create steam, as the water in the dough evaporates when baked, puffing the pastry. The pastry is used in many European cuisines, including French cuisine and Spanish cuisine, and is the basis of many notable desserts, including profiteroles, éclairs and churros. History According to some cookbooks, a chef by the name of Pantarelli or Pantanelli, Catherine de' Medici's head chef, invented the dough in 1540, seven years after he left Florence with Medici and her court. He used the dough to make a gâteau and named it . Over time, the recipe of the dough evolved, and the name changed to , which was used to make , named after Pantanelli's successor Popelini, small cakes supposedly made to resemble the shape of a woman's breasts. Popelins were common aristocratic desserts in the 16th century, and were flavored with cheese or citrus (for example lemon peel, orange blossom water, etc.). They were prepared from dough that had been dried over a fire to evaporate its water, which was called (literally meaning 'hot pastry'). The name pâte à choux derives from this (contrary to the common misconception that “choux”—French for “cabbage”—refers to the similarity between the shape of the pastry and the shape of a head of cabbage). Then, royal chefs Jean Avice, a , and , who worked in the court of Marie Antoinette, made modifications to the recipe in the 18th century, resulting in the recipe most commonly used now for profiteroles. Essential ingredients and manner of rising The ingredients for choux pastry are butter, water, flour and eggs. Like Yorkshire pudding or David Eyre's pancake, instead of a raising agent, it employs high moisture content to create steam during cooking to puff the pastry. The high moisture content is achieved by boiling the water and butter, then adding the flour. The mixture is cooked a few minutes longer, then cooled before adding enough eggs to achieve the desired consistency. The boiling step causes the starch in the flour to gel, allowing the incorporation of more water. Foods made with choux pastry This pastry is used to make choux (small puffs), as the name implies, but also