First, place the all-purpose flour in a large bowl.
Second, add the cold butter to the flour. You can cube it or grate it. I chose to grate the butter because the thin slices are easier to incorporate with your fingers. You want to mash the butter into the flour until it resembles a coarse meal, almost like sand.
Third, add the egg, salt, cold water, and white vinegar to the flour and butter mixture.
Mix all of the ingredients with your fingers until the dough forms.
After the dough has come together, wrap it completely with plastic storage wrap and flatten it into a disc so that it’s easier to roll out later. Place the wrapped pie crust into the fridge to rest for at least 20 minutes.
Once the pie crust has finished resting in the fridge, place it onto a lightly floured surface to roll out.
Using a rolling pin, roll out the pie crust to the size of your pie-baking dish. Be sure to put flour on top of the dough and the rolling pin to make sure that it doesn’t stick.
Then, roll your dough around the rolling pin to transfer it into the pie dish.
Next, trim the extra dough (hanging off of the pie dish) with a knife but leave enough to have a thick crust on the edge.
Crimp the edges of the crust any way that you like. You can use a fork or your fingers. I chose to use the ribbon method with my fingers.
Crack the additional egg, add a splash of water to a small bowl, and beat with a fork to make your egg wash.
Brust the edges of the finished pie crust with the egg wash.
Place the pie crust in the fridge until ready to fill and bake.