In a microwave safe bowl, combine 1 cup Green Candy Melts, peanut butter and vegetable or canola oil. Microwave on on HIGH for 30 seconds, stir and cook in 15 second intervals until smooth. Pour Cereal into bowl and mix until well coated.
Open gallon size zip lock bag and pour in cereal mixture. Seal bag, add in powdered sugar, and shake until well coated.
Pour coated cereal onto parchment or wax paper and allow to set. Pour on M&M’s, Shamrock sprinkles, and shamrock marshmallows and stir.
Store in an airtight container for up to a week.