Unwrap all 16 pre-made Original Rice Krispies Treats and place them on a work surface.
Spread 4 ounces green pre-made decorating icing onto 8 of the Rice Krispies Treats.
Then sprinkle the black sugar sprinkles on the top portion of the Rice Krispies Treats with the free frosting. Place 2 candy eyes on each green-frosted treat. Use the 0.67-ounce black writing gel to pipe a monster mouth onto each of the green-frosted treats.
On the remaining 8 Rice Krispies Treats, place 2 candy eyes in the center of each treat using the 4 ounces white pre-made decorating icing as the adhesive.
Drizzle the remaining white decorating icing across the tops of the treats to resemble mummy bandages. Allow the icing to set for a few minutes before serving.
Serve and enjoy!
Notes
Store the leftovers in an air tight container for up to 1 week. Please add a recipe card on this post right below where I put: "Print this Halloween Rice Krispie Treats Recipe:"