Line a cookie sheet with parchment paper.
Using a double boiler, melt 1 bag of the chocolate wafers, mixing gradually with a rubber spatula until completely melted.
Using a fork, dip the Oreo into the chocolate and flip the cookie over to fully coat it.
Slowly pick up the Oreo with the fork and lightly tap the edge of the pot to shake off the excess chocolate.
Place onto the cookie sheet and repeat steps with remaining cookies.
Place a non-melted chocolate wafer onto the lower part of the Oreo for the snout.
Take a red M&M and dip the bottom into the leftover melted chocolate, then place it onto the wafer for the nose.
Place two eyes above the mouth.
Repeat steps with remaining cookies.
Place Oreos into the fridge for 20 minutes or until chocolate is hardened. Once the chocolate is hard, flip Oreos over.
Dip the bottoms of two pretzels into melted chocolate and place onto the corners of the back of the Oreo for the antlers.
Repeat step with remaining cookies.
Let chocolate harden before enjoying it!