Ingredients 1 to 5 are for the all butter pie crust. Cut butter into mixed flour and salt, mix well with hand, add ice water to firm a dough. 1到5是做派饼的材料，黄油切小粒，加入面粉中，用手搓到均匀，加冰水揉成面团。
Divide the dough into 2 by using scale to measure, 1 slightly 20g heavier since it is for the bottom. Wrap and put into fridge. 用秤称重，把面团分成两个，一个比另一个大50g左右，因为是做派底的，保鲜膜包上，压成饼状，放入冰箱冷藏。
Now making filling. In a large bowl, mix flour and spices well.
Peel and cut apple into thin slices, about 2mm thin. Toast in the bowl until all apple slices are coated with ingredients. Set aside while making pie crust.
Preheat oven to 425F.
Pie crust should be 2 inches larger than the pie dish. Use plastic wrap to flatten the dough.
Put pie crust on pie dish, smooth bottom.
Put all prepared apple fillings in the pie dish.
Cover with another piece crust on top. Press edge together, use a folk to press the edge for decoration. Brush egg whites on top. Make 5 slices on top of pie.
Put pie dish on a baking pan. Bake 20 minutes at 425F for the crust.
Reduce heat to 350F, bake another 70 minutes. Should check pie crust after 40 minutes baking. Cover with aluminum foil to prevent from Burning.
Let it cool fully before serving.
1. 苹果不要只用青苹果，太酸了。Cosmic Crisp比Honey Crisp更甜，要少加两勺糖，或者加一个青苹果调节酸甜口味。 2. Emili Henry pie dish 很深，苹果烤后会缩，大苹果用6个，中号苹果用8个。 3. 根据苹果的甜度调整糖的用量，比honey crisp甜度低的要多加一勺糖。 4. 用Monkfruit sweetener替代白糖，1比1的比例。 5. 苹果拌料要尽量均匀。 6. Costco爱尔兰产Kerrygold黄油纯度高，做出的派皮又酥又香，如果怕热量高，黄油可以减量到190克，待客的话不要减量，派皮不容易成型。 7. 可以用等量有盐黄油替代无盐，盐就不用另加了。