Absoutely Best Pie Crust Ever...

3 Cups all-purpose flour
2 Tbsp. sugar
1 tsp.. kosher salt
8 Tbsp. cold unsalted butter (1 stick)
1/4 Cup vegetable shortening
3 Tbsp. ice water
1 egg, lightly beaten
2 tsp. white distilled vinegar

1. In a large bowl combine flour, sugar, and salt. Using a pastry blender and working quickly to prevent butter from melting into flour, cut in butter and shortening until mixture resembles coarse crumbs. (I used my large mixer and it worked great!)
2. In a small bowl combine ice water, beaten egg, and vinegar; stir to mix. With a fork, mix egg mixture into flour mixture just until dough clumps together and is moist enough to pat together; do not overmix. If dough is dry and crumbly, add more ice water, 1 Tbsp. at a time, just until dough comes together. Dough should not be wet or sticky.
3. Turn out dough onto lightly floured surface.