Preheat oven to 350 and spray baking dish with cooking spray
Mix sugar and cinnamon in small bowl
Cut cinnamon buns into quarters (should look like bite sized pieces)
Add bite sized pieces to 13x9 baking pan and toss with cinnamon sugar mixture. Make sure each piece is coated.
In small bowl mix melted butter and brown sugar until combined completely and sugar is disolved. Pour over dough in baking pan
Bake for 30 minutes. Once baking is complete, let it sit for 10 minutes before drizzling over the icing packets