01 - Place Chex cereal in a large mixing bowl and set aside.
02 - In a microwave-safe bowl, combine chocolate chips, peanut butter, and butter. Microwave in 30-second intervals, stirring between each, until melted and smooth (about 1–2 minutes total).
03 - Stir in vanilla extract.
04 - Pour the melted mixture over the cereal and gently fold with a spatula until all pieces are evenly coated.
05 - Transfer the coated cereal to a large zip-top bag. Add powdered sugar, seal, and shake vigorously until all pieces are well coated.
06 - In a small microwave-safe bowl, melt green candy melts (or white chocolate chips with a few drops of green food coloring) in 20-second bursts, stirring until smooth.
07 - Drizzle the green candy over the puppy chow and toss gently to distribute. Spread the mixture on a lined baking sheet. Sprinkle with green and gold sprinkles and green chocolate candies. Allow to set for 10 minutes before serving.