Empanada dough is not the same as pie dough. Empanada dough is made with flour, water, salt, and fat. Pie dough is made with flour, water, salt, and sugar. You can use pie crust if you don't have time to make your own dough and can't find any pre-made, but it won't turn out the same. It will be more sweet than savory and won't have the same crunch.