A croissant is a buttery, flaky, viennoiserie pastry of Austrian origin, Croissants have long been a staple of Austrian, Italian, and French bakeries and pâtisseries. The modern croissant was developed in the early 20th century. In the late 1970s, the development of factory-made, frozen, pre-formed but unbaked dough made them into a fast food that can be freshly baked by unskilled labor. The croissant bakery, notably the La Croissanterie chain, was a French response to American-style fast food, and as of 2008, 30–40% of the croissants sold in French bakeries and patisseries were baked from frozen dough. Croissants are a common part of a continental breakfast in many European countries.