Found this recipe.....
Gluten-Free Pie Dough
This can be used for savoury or sweet pies. Double the recipe for a double crust pie.
1 cup gluten-free all-purpose flour mix*
1/2 teaspoon salt
1/2 cup cold unsalted butter, cut into pieces
1 large egg
2-4 tablespoons very cold water
Using a food processor: Place the flour and salt in the processor bowl fitted with the blade attachment. Pulse to combine. Add butter and pulse until the mixture is crumbly and no large pieces of butter remain. Add the egg and 2 tablespoons of water. Pulse again until mixture sticks together when formed into a ball. If necessary add remaining water, 1 tablespoon at a time until the dough comes together. Form into a disk and use immediately or wrap in plastic wrap and refrigerate for up to 3 days.
Mix by hand: Place the flour and salt in a large bowl. Stir to combine. Add butter and cut it in using a pastry cutter or your fingers, until the mixture is crumbly and no large pieces of butter remain. Add the egg and 2 tablespoons of water. Toss with a fork until mixture sticks together when formed into a ball. If necessary add remaining water, 1 tablespoon at a time until the dough comes together. Form into a disk and use immediately or wrap in plastic wrap and refrigerate for up to 3 days...........
Hope it helps, I have never made it myself....
