Start by crushing up Oreos with your hands and set aside

Melt all the chocolate chips in a large mixing bowl (I just Microwaved them for 2 minutes, stirred, then microwaved another 1 minute)

Melt butter for 45 seconds 

Add the butter into the melted chocolate and stir vigorously with a large spoon until thoroughly combined 

Then add the crushed Oreos and use the large spoon to gently mix them evenly into the fudge batter

Pour this mixture into a cake pan that is lined with parchment paper 

Flatten the fudge batter into the pan 

Drizzle Smuckers marshmallow topping over the top of the fudge

Then set in the refrigerator to harden. Wait at least 1 hour before cutting up into fudge squares