Please make note that this recipe is enough to cover the bottom of a large pie, and allow enough for decorating the top with moderate-coverage lattice technique.
First, be sure that the butter, or substitute/combo you're using is cold. Beforehand, I recommending cutting the butter it into pats that are about tablespoon sized, and place them in the fridge for when you are ready to make the dough.
In a large bowl, place all the dry ingredients. Next, put the butter pats on top, and use a pastry blender to push the butter into the flour mixture, cutting it all into ams, pea-sized pieces.
Place this mixture into the bowl of a standing mixer with a standard, metal paddle attachment. Add the water a little at a time, and mix at low-medium speed until the dough has combined and completely lifts from the bowl. Use your hands to form the dough in to a ball.
At this point, you can choose to work with the dough to make a pie crust, or completely cover the ball in plastic wrap and refrigerate for later use.
If you're ready to roll, place the dough onto a silapt mat or parchment paper that has been dusted with gluten free flour.
With a rolling pin, roll the dough flat, until it's smooth and about 1/4" high all around.
Using the mat or paper, invert the rolled-out dough into your pie pan.
The dough is very similar to shortbread so it's elastic and super easy to work with. You can fill in any spaces or mistakes with your hands and like magic, it comes together beautifully and seamlessly.
Once your pie pan is prepared with the dough, set it aside. Form another ball with the remaining scraps of dough and re-roll out the rest, that will be used for the top of your pie.
If you like to use an egg wash, for a golden-brown finish to the crust, simply take one egg white and whisk it in a small bowl. Use a kitchen safe brush to apply it onto the inside and all around the crust. It would be best if you do this just before pouring in the prepared pie filling. If you need your recipe to be vegan or free of animal products, do not use the optional egg wash and use the butter substitute options as mentioned in the attached recipe notes.