01 - Place the rice cereal squares in a large mixing bowl, ensuring plenty of space for coating.
02 - Combine white chocolate chips, peanut butter, and butter in a microwave-safe bowl. Microwave in 30-second intervals, stirring between each, until smooth and fully melted (approximately 1-2 minutes).
03 - Stir in vanilla extract until fully incorporated into the melted chocolate mixture.
04 - Pour the chocolate mixture over the cereal and gently fold with a spatula until all pieces are evenly coated.
05 - Transfer the coated cereal to a large gallon-size zip-top bag. Add powdered sugar, seal the bag, and shake vigorously until the cereal is thoroughly coated with the sugar mixture.
06 - Spread the mixture out on a parchment-lined baking sheet and allow to cool for 10 minutes, ensuring the chocolate coating sets properly.
07 - Once cooled, stir in green candy-coated chocolates, mini marshmallows, chopped gold coins, and green sprinkles. Gently toss to distribute evenly.
08 - Store in an airtight container until ready to serve. Best enjoyed within 3 days for maximum freshness and texture.