Mix the flour (1¼ cup), salt (½ tsp) and sugar (½ tsp) together.
Cut the cold butter (1 stick) into cubes.
Add the flour mixture and butter cubes to a food processor.
Pulse until the mixture resembles crumbs and the butter is well incorporated.
Add egg yolk and vanilla extract.
Pulse to incorporate.
Turn over the mixture into a bowl or onto the counter top.
Spoon 1 tbsp of ice water onto the mixture.
Knead to combine.
Continue adding water 1 tbsp at a time until the dough comes together.
Flatten the dough into a disc.
Wrap with plastic.
Place in the fridge for 1 hour to chill.
After 1 hour, preheat oven to 375°F.
Butter the 9-inch pie dish.
Remove the chilled dough from fridge. Unwrap.
Place the dough on a floured surface.
Roll out to ⅛-inch to ¼-inch in thickness.
Place the rolled out dough into pie dish. Press in.
Trim and crimp the edges.
Place the pie dish in the fridge again.
Chill for 15 minutes.
Remove from the fridge.
Poke the dough several times with a fork.
Place parchment paper over the dough.
Add pie weights or dry beans.
Blind bake in the preheated oven for 15 minutes.
Remove from the oven.
Lift off the parchment paper with the weights.
Return to oven.
Bake for 5 minutes or until the pie crust is golden brown.
Remove from oven. Turn off the oven.
Set aside to cool.