If you have a food processor, have at it. Mine is on the fritz, but honestly, this process take like 45 seconds longer with a hand pastry tool like this one, so to me it isn’t worth making the mess of the food processor for one pie crust. If you don’t have either, you can still make a pie crust, in the old days, it was done with a couple of butter knives, so have at it, cut away!