Latin America has plenty of recipes for empanadas, both sweet and savory. The crust in the recipe is an old-fashioned vinegar and egg crust. The vinegar prevents the development of the wheat gluten in the flour, which can make the crust tough. The protein in the egg keeps the crust tender as well. Be warned that you might see a few pickled strands of egg in your dough, but they won’t hurt the flavor or texture of your empanada. Back in the day, if you were the not-so-skilled home baker, this recipe would guarantee a tender result.