01 - Place the rice cereal squares in a large mixing bowl, ensuring there's ample space for coating.
02 - In a microwave-safe bowl, combine white chocolate chips, peanut butter, and butter. Microwave in 30-second intervals, stirring between each, until smooth and fully melted (about 1–2 minutes). Stir in vanilla extract until well incorporated.
03 - Pour the melted chocolate mixture over the cereal and gently fold with a spatula until all pieces are evenly coated with the chocolate mixture.
04 - Transfer the coated cereal to a large zip-top bag. Add powdered sugar, seal the bag tightly, and shake vigorously until the cereal is thoroughly coated and no longer sticky.
05 - Spread the mixture out on a parchment-lined baking sheet in an even layer. Allow to cool for 10 minutes until the chocolate coating sets.
06 - Once cooled, stir in green candy-coated chocolates, mini marshmallows, chopped gold coins, and green sprinkles. Gently toss to distribute evenly without crushing the cereal.
07 - Store in an airtight container until ready to serve. Best enjoyed within 3 days for maximum freshness and texture.