Why is butter usually the best choice of fat for making pies?

Butter is typically regarded as the best choice of fat for making pies primarily because of its exceptional flavor. When used in pie crusts, butter contributes a rich, creamy taste that enhances the overall quality of the pie. The unique flavor profile of butter can elevate both sweet and savory pies, making them more appealing to the palate.

While other fats can be used, such as shortening or oils, they often do not provide the same depth of flavor that butter does. The taste of the pie crust can significantly impact the enjoyment of the pie itself, which is why flavor is a critical consideration in choosing the type of fat.

Other options, such as cost, ease of use, and healthiness, might be factors in certain contexts, but they do not outweigh the importance of flavor in the context of pie-making.