Remove both of the wrapped dough balls from the refrigerator.
The trick to rolling out dough and being able to transfer, is parchment or waxed paper (or even plastic wrap if you’re desperate). Place a piece of parchment on the counter, place your dough ball on top and then top with another piece of parchment. Roll out to 1/4″ thick between the two sheets.
After you get one rolled out, I pop it in the freezer while I work on the other.
Once the second pie crust is rolled out, pour your brown sugar filling in the center. With a wooden spoon or rubber spatula, spread the mixture evenly, leaving 1″ around the perimeter.
Take your extra tablespoon of melted butter and using a pastry brush, brush around the edges.
Remove your first crust from the freezer and flip over on top of the bottom crust. Slowly pull back the parchment the crust was rolled out on.
Gently press the two crusts together with your finger, working around the whole perimeter.
Using a fork dipped in flour, press the crust together around the edges.
Place the Brown Sugar Cinnamon Pop Tarts in a preheated 350 degree oven for 25 minutes, rotating halfway through baking.
While this bakes, make your icing.