Place the all-purpose flour, sugar and salt in a large bowl and mix them together.
Add the cold butter cut into cubes and mix them in with the flour mixture.
Pinch the flour along with the dry ingredients to break it up. We don't want to completely turn it into tiny pieces like we would in other recipes. You should stop when you see about half tiny pieces and half medium pieces of butter. This is what makes this all-butter pie crust extra flaky.
Add the water and knead slightly with your hands to incorporate the dough. Only knead until it comes together completely. Don't knead more than you have to or it will turn tough. You will notice spots of butter in the dough and that's perfect.
Refrigerate the ball of dough covered in plastic wrap for 30 minutes or up to 2 days. You can also freeze it for up to 2 months. Now it's ready to roll out and use in your favourite pie recipe.