In a large bowl, whisk together the flour, sugar and salt.
Measure out the crisco and add to the flour mixture.
Using a pastry cutter, cut the fat into the flour until the flour and fat has formed pea sized balls
In a small bowl, whisk together the water, egg and vinegar.
Pour the wet ingredients over the flour mixture.
Using a rubber spatula, fold the wet ingredients into the flour and fat until a loose ball forms.
Coat your hands with flour and squeeze the dough together to form a tighter ball of dough.
Cover the ball of dough in plastic wrap and chill in the refrigerator for at least 30 minutes or even over night. When rolling out the pie dough, be sure to roll the dough on a lightly floured surface and add flour sparingly if the dough is sticky.