Preheat your oven according to your cake mix box.
Mix together your cake mix, eggs, oil and water in a large bowl.
Fill a muffin pan with cupcake liners.
Fill cupcake liners about 2/3 full and bake in preheated oven according to package directions.
Repeat with additional batter (if you don't have 2 muffin pans)
Allow cupcakes to cool completely
Frost cupcakes with chocolate frosting, using your finger or a knife make little "ears" with the frosting at the top of the cupcakes.
Open oreos in half and place two of the Oreos, with the frosting on the cupcakes.
Take a little extra frosting on the back of your m&ms and place 1 brown m&m in the middle of each for the eyes.
Stick one orange m&m in between the Oreo eyes (up and down).