Whisk the Flour, sugar, and salt until well mixed.
Sprinkle frozen butter into mixture a bit at a time and mix until it looks like lumpy flour.
Remove bowl from mixer and add water, one shot at a time, sprinkling over dough.
Use a spatula to gather the dough, and form into a rough ball. If it is too crumbly, add up another shot of water until it keeps together.
Remove from bowl and split into 2 even balls. Flatten balls, wrap with plastic, and refrigerate for an hour before rolling.