Mix butter with sugar and salt until well combined.

Mix in egg yolks.

Add flour 1 cup at a time. (at this point I just used my fingers to mix or a hand mixer on low)

Mix until the dough forms a small crumb-like texture

Pour into 9" pie plate, or container of choice, and press dough against sides and bottom and form the shell

Put into freezer for about 15-20 minutes

Bake at 350F for 20-25 minutes until it just starts to turn brown

Set aside to cool