Preheat oven to 350F.
Mix together brown sugar, flour, cinnamon, and melted butter. Set Aside. Filling should be mildly damp like a not very wet sand. Butter amount may need to increase if your brown sugar is dried out.
On a parchment lined baking sheet, place one, round, 9' pie dough crust.
Spread 1 tablespoon of melted butter on pie crust.
Place filling mix on pie crust, leaving a 1" circle perimeter on the outside of crust uncovered. With a gentle but firm hand, press filling into pie crust.
Place second pie crust directly on top of first. Press the edges together. Crimp edges using a fork.
Bake for 20-25 minutes until golden brown. Check after 10 minutes to see if you need to rotate your baking sheet for even browning.
Cool for 1 hour before frosting and cutting.
Combine ½ cup powdered sugar, 1 teaspoon. cinnamon, and 1-2 Tbs. water. Mix until fluid, but glaze should not be runny. Pour over top pie crust. Allow to set up before cutting.
Cut and enjoy!
