If you have a food processor, I like to use it for this, if not, use a pastry cutter or just your hands. The process will be the same.
Add all-purpose flour, whole wheat flour, and sugar to a bowl. Combine.
Then add in the chilled butter and pulse or blend to combine. You want the butter in small pea-sized chunks.
Add in the egg yolks and ¼ cup chilled ice water. Combine, if you need to add a little more water.
Divide into 2 pieces and wrap with plastic wrap. Let this chill in the fridge for at least 2 hours.
Then roll out your dough on a lightly floured surface into the size you want. Press into your pan. Place in the freezer to chill for about 10 minutes.
While it is chilling, preheat the oven to 375 degrees.
Bake until the crust is golden brown.
Allow it to cool before filling.