Directions:

• Line a 9x13 pan with tinfoil or wax paper. If using tinfoil, spray with non-stick cooking spray.
• Add the mini marshmallows and butter to a large saucepan and heat on low/medium heat, stirring occasionally. Once the mixture is about 1/2 melted, add several drops of green gel food coloring.
• Fold in the 6 cups of Rice Krispie cereal.
• Pour the mixture into the prepared pan and gently press down evenly.
• Allow the treats to set prior to cutting.
• If you are pressed for time, place the treats in the fridge for 20 minutes to firm them up.
• Line a separate baking sheet with wax paper.
• Using the shamrock cookie cutter, cut the treats as close together as possible and place them on the prepared baking sheet.
• Heat the white frosting in the microwave for 10-15 seconds. You don't it liquidy but you do want it soft enough to drizzle over the treats.
• Scoop a few spoonfuls of the frosting into the sandwich baggy and make a small snip in the corner.
• Gently squeeze the frosting from the bag over the shamrocks going in a back and forth motion.
• Repeat with all shamrocks.