If you are baking a pie crust, pastry dough, pizza, or any other dough-type good and you want your dough to be more tender, there's a simple way to get this. Just add vinegar to your dough when you are mixing. You'll want to one teaspoon of vinegar for each cup of flour in the dough. The key here is that you need to remove a corresponding amount of milk or water from the dough recipe for the amount of vinegar that you put in... basically, don't increase the total amount of liquid in the dough recipe since this will result in a sticky dough.

Doing this, you'll get a much more tender dough, and the vinegar does not affect the taste at all.