Roll out your pie dough and cut into rectangles roughly 3x4 inches each. Place back into fridge.
Make the filling by mixing the brown sugar, cinnamon, and flour together in a bowl.
Remove the rectangles from the fridge & spoon filling over half of them, leaving rom on the edges.
Place the other halves over the tops of each pop tart & pinch edges closed using a fork.
Mix together milk & egg to create and egg was & brush the tops of each pop tart. Poke several holes in each pop tart for steam to escape.
Place back in fridge to set for 20 minutes.
Bake in a 350℉ oven for 25 minutes until pop tarts are golden brown.
In a medium bowl, make the glaze by mixing together powdered sugar, milk, vanilla, & cinnamon. Once the pop tarts have cooled, spoon the glaze over each pop tart and spread using the back of the spoon or a spatula.
Allow glaze to set for about an hour. Enjoy!