Open each Rice Krispie Treat and discard the packaging.
Line a large baking sheet with parchment paper.
Open and pour the Wilton green candy melts into a microwave-safe dish. Heat in the microwave in 30-second increments, stirring until melted.
Dip each Rice Krispie Treat into the green melted chocolate to coat. Lift the treat using a fork and allow the excess chocolate to drip back into the bowl. Place on the parchment lined baking sheet and give each treat 2 eyes. Repeat with the other Rice Krispie Treats.
Place the Rice Krispie Treat in the fridge for 20-25 minutes to set.
Pour the black candy melts into a microwave-safe dish and repeat melting instructions.
Allow the melted black chocolate to cool a few minutes and scoop into one of the small sandwich baggies. Snip a corner of the bag and give each Rice Krispie Treat a mouth and hair by gently squeezing the chocolate out of the sandwich bag and onto the top of the treats.
Allow the chocolate to set.
Pour the red candy melts into a microwave-safe dish and repeat melting instructions.
Scoop the melted red chocolate into the second sandwich bag and snip the corner.
Gently squeeze the red melted chocolate out of the bag to make a red scar across Frankenstein’s face.