In a large bowl or food processor, combine your flour, baking powder, sugar, and salt. Mix or pulse together until evenly distributed.
Add cold, cubed butter to the flour mixture. Combine using a fork, pastry cutter, or food processor until the butter is broken down, but still chunky (slightly larger than the size of a pea).
Add 6 tablespoons of cold water and mix to incorporate. If the dough seems too dry, continue to add 1 tablespoon of cold water at a time until your dough holds its shape when you squeeze it with your fingers.
Portion out your dough evenly onto 2 large pieces of plastic wrap. Shape into 2 disks, and wrap the disks tightly in plastic wrap. Chill in the fridge for at least one hour before rolling and shaping your pie.