Easy Mississippi Mud Oreo Brownies

"Are you in for a very decadent, rich chocolate Oreo Marshmallow brownie dessert for your chocolate cravings? These Mississippi Mud Oreo Brownies are the answer to your heavenly dreams! Mississippi Mud Brownies are a delicious combination of chocolate brownies, easy, creamy chocolate frosting, and melted marshmallows! However, in this recipe we added Oreos, because brownies and Oreos are so good together! These sinful brownies are so easy-to-make, using a boxed brownie mix! Then Oreo sandwich cookies are layered inside the brownies, then topped with marshmallows and a simple, delicious gooey chocolate fudge frosting! Swooning so hard right now!"