1 package pillsbury pie crust (2 crusts)
1/2 cup unsalted butter
3 tablespoons all-purpose flour
1/2 cup white sugar
1 tsp cinnamon
2 tsp vanilla extract
1/2 cup packed brown sugar
1/4 cup water
8 Granny Smith apples - peeled, cored, and sliced
Melt butter in a sauce pan. Stir in flour to form a paste. Add white sugar, brown sugar cinnamon, vanilla, and water; bring to a boil. Reduce temperature, and simmer 5 minutes. Pour sliced apples into pan to coat them with sauce mixture. Place the bottom crust in your pan. Fill with apples, mounded slightly. Cover with a lattice work crust.
3. Bake 15 minutes at 425 degrees F (220 degrees C). Reduce the temperature to 350 degrees F (175 degrees C), and continue baking for 35 to 45 minutes.