01 - Preheat oven to 350°F. Spread shredded coconut evenly on a baking sheet and toast for 5–7 minutes, stirring occasionally, until golden brown. Let cool completely.
02 - In a microwave-safe bowl, combine semi-sweet chocolate chips, creamy peanut butter, and unsalted butter. Microwave in 30-second bursts, stirring between each interval, until fully melted and smooth.
03 - Place Chex cereal in a large mixing bowl. Pour the melted chocolate-peanut butter mixture over the cereal and gently toss until every piece is evenly coated.
04 - In a small microwave-safe bowl, heat caramel candies with milk or cream in 20-second intervals, stirring between each, until smooth and drizzle-able. Pour over the coated cereal and toss to combine.
05 - Sprinkle the toasted coconut over the caramel-coated cereal and gently fold to distribute evenly throughout the mixture.
06 - Transfer the mixture into a large zip-top bag or lidded container. Add powdered sugar, seal tightly, and shake vigorously until every piece is thoroughly coated.
07 - Spread the coated puppy chow onto a parchment-lined baking sheet in an even layer. Allow to cool and set completely.
08 - If desired, drizzle with additional melted chocolate and caramel sauce. Allow the drizzle to set before serving or storing.