The primary ingredient used in traditional apple pie is apples, which provide the dish with its signature flavor and texture. Typically, tart varieties such as Granny Smith or Honeycrisp are favored for their balance of sweetness and acidity. The apples are usually peeled, sliced, and then mixed with sugar, cinnamon, and sometimes nutmeg before being encased in a flaky pastry crust. This combination allows for the sweet and spicy filling to caramelize during baking, creating a delicious contrast with the buttery crust. Apple pie is a beloved dessert, especially in American cuisine.