"Vodka is essential to the texture of the crust and imparts no flavor — do not substitute. This dough, which was developed by a test-kitchen team led by J. Kenji Lopez-Alt for "America's Test Kitchen," will be moister and more supple than most standard pie doughs and will require more flour to roll out (up to 1/4 cup). Featured in: Christopher Kimball's Favorite Test Kitchen Discovery: Foolproof Pie Dough...."