Place flour, salt, and sugar in a food processor and pulse a few times to combine.

Add in the shortening and butter and process until the mixture is crumbly.

With the machine running, drizzle in the ice water, starting with a 1/4 cup until the mixture forms a dough. Add more, 1 tablespoon at a time as needed until the dough comes (mostly) together.

Turn the dough out onto the counter and press it together to form 1 ball, don't work the dough too much.

Split the dough in half, form into a thick disc and wrap each half tightly in plastic wrap and refrigerate for 8 hours or overnight.

Allow the dough to sit at room temperature for 15-20 minutes prior to rolling.