Make a half-batch of rice crispy treats: heat 2 cups of mini marshmallows and 2 tbsp of butter in a microwave-safe bowl for 1 minute. Stir to combine and add 3 cups of rice crispies. Add rice crispy mixture to greased 8x8 pan and press down to condense (you'll want these to be denser than typical rice crispy treats).
Now use a circle cookie cutter to cut out a circle shape from the rice crispies. Dip this into melted white candy melts to coat the top.
Measure the size of the crispy treat and print out a Black Panther decal the same size for detailing. Place a piece of parchment paper over the print out to create the circle detail around the edge and the Black Panther head piece with melted black candy melts in a piping bag. I placed both in the freezer to set.
Once they are solid, use melted white candy melts in a piping bag to add white detailing on the head piece, then use the same candy melts to "glue" the circle edge and face plate to the front of the rice crispy treat.
Add three scoops of cookies & cream ice cream, 5 Oreos, a cup of milk and a handful of ice to your blender and blend until combined. You may have to adjust milk and ice a bit depending on your blender.
Coat the outer top of your milkshake glass with white icing then roll in crushed Oreos. Once you have good coverage, place the cup into the refrigerator for a minute to harden.
Once the icing has hardened, pour the finished milkshake into your cup, add your Black Panther rice crispy decal (I anchored the crispy treat with a candy stick inserted into the treat), the black rock candy, top with whipped cream and pop in a couple of straws to enjoy.