First, in a medium sized bowl combine the flour and salt together and set aside.
Next, take and cube the butter and cut the butter into the dry ingredients until it resembles fine crumbs.
You can do this with a pastry cutter or a large fork.
Be sure to work at this until you have reached the proper distribution of the small butter pieces, then set aside.
In a glass measuring cup measure the cold sourdough discard and cold water and stir with a fork to combine.
Then add the liquid ingredients with the dry ingredients and mix with a fork or by hand until the dough comes together.
If it seems dry add a tablespoon of water at a time until it comes together nicely. Be careful not to overwork the pie dough-you want a tender crust.
Form the pie dough into a disc (alternately you can wrap in a piece of plastic wrap and place in the fridge for up to a couple days for a cold ferment) and place on a lightly floured surface. Roll the dough and add more flour as needed to prevent sticking.
I will sometimes flip the pie dough to flour both sides.
Roll the pie dough so that it is plenty big for what you need for your pie plate. This recipe is enough for a 9” or 10” pie pan.
Once it is rolled out fold it into half and then half again and place in the pie shell. Unfold the crust and trim the sides by hand to about 1-2 inches.