In a medium mixing bowl, combine flour, salt, and xanthan gum.
Cut butter (or shortening) into flour.
The butter should resemble the size of small peas.
Add milk.
Use your hands to work the milk into the dough, until the ingredients are combined and the dough forms a ball. Add more milk if needed.
Divide dough in half and roll one dough ball between two pieces of wax paper. Repeat with the second dough ball.
Remove the top piece of wax paper and place the pie pan upside down on dough.
Flip the pan and pie crust dough over so the pie pan is right side up. Peel the wax paper off. Repair and pinch the gluten-free pie crust dough into shape.
If you are baking the crust and then filling it with filling, preheat oven to 425°F (220°C). Bake for 15 - 18 minutes or until cooked through.
For other recipes where you bake the pie with the filling in it, follow the recipe baking instructions.
