To make the crust, cut butter into cubes and add to a bowl with the flour. "Cut" butter into the flour using a pastry cutter, forks, or your hands, until the butter is the size of pebbles.
In a small cup, combine water and apple cider vinegar. I like to add a few ice cubes to get the water cold. Sprinkle a few tablespoons of water mixture at a time into the flour butter mixture. Mix until a shaggy dough forms.
Split dough in half. Press each half into a ball. Place ball on a piece of plastic wrap and press into a disc shape. Wrap in the plastic wrap and place in fridge to chill, about an hour.
Once chilled, remove from fridge. Remove one of the discs. You can save the other half for later. You can also freeze it.
On a lightly floured surface, roll out dough big enough to fit into a pie plate. Lay onto pie plate, cut off any excess, and crimp edges.