What does "Dartois" refer to in culinary terms?

"Dartois" refers specifically to a technique in pastry making where two pieces of puff pastry are stacked on top of each other. This method enhances the flaky texture that is characteristic of puff pastry, allowing for an increased rise during baking due to steam being trapped between the layers. The process of layering dough and butter contributes to the creation of many thin, distinct layers that become airy and crisp when baked, resulting in a light and flaky pastry.

This stacking technique distinguishes Dartois from other pastry types that might use single sheets or different finishing methods. For instance, a single layer of pastry does not achieve the same texture, nor does it involve layering for height. Similarly, the Dartois is not about filling—like a cream filling—or techniques such as egg washing, which are used for glazing and adding sheen rather than influencing the structural texture of the pastry.