Gather ingredients and get them nice and cold
Whisk the egg with 1 tbsp of the cold water and pop it back into the fridge.
Cube the butter then put it into the freezer for about 15 minutes-careful not to leave it in too long. We want it cold-not frozen!
In a separate mixing bowl whisk together the flour and the salt and chill in freezer for a few minutes.
Place the flour mixture in your bowl (or food processor if using one) with the cubed butter and pulse together leaving some larger chunks. If using a stand mixer, turn the mixer to low and mix until the butter is flattened leaving some larger chunks. Add the egg and mix until combined.
With clean hands, knead the dough together until it begins to come together. Add ice water by the teaspoon only if necessary for the dough to hold together.
Turn the dough out onto a sheet of plastic wrap and press it into two disks as you close the plastic wrap around the dough. Place the dough in the refrigerator to chill for 30 minutes.
Preheat oven to 375F. Generously grease two 9-inch pie pans and set aside.
To prevent over-flouring, I like to use plastic wrap to roll out the dough. Lightly sprinkle with GF flour and then roll out between plastic wrap (it also makes it easier to transfer to pie pan!).
Remove one layer of plastic wrap and gently transfer to pie pan, removing second layer of plastic wrap. Crimp edges as desired and bake until golden brown. Enjoy!