Final answer:
To prevent a pie shell from puffing up during baking, you should pierce holes in the crust with a fork, a process known as docking.
Step-by-step explanation:
The most effective method to prevent an empty pie shell from puffing up during baking is option A: piercing holes in it with a fork, a technique commonly referred to as docking. This process involves creating small holes in the bottom and sides of the unbaked pie crust, allowing steam to escape during the baking process and thus preventing the dough from puffing up.
Docking serves as a crucial step, particularly when pre-baking or 'blind baking' a pie crust. Blind baking is a technique used when a recipe calls for a fully baked pie shell before adding the filling. Without docking, the trapped steam within the dough can cause the crust to inflate, resulting in an uneven or misshapen pie shell that may not accommodate the intended filling properly.
Using a fork to pierce the pie crust creates channels for steam to escape, ensuring that the crust maintains its shape and structure. This method is both practical and simple, allowing for consistent and desirable results in pie preparation. By preventing the formation of air pockets and maintaining the integrity of the crust, docking contributes to the success of various pie recipes, whether sweet or savory. Ultimately, incorporating this technique into the baking process enhances the overall quality and presentation of the final pie.