Follow these simple steps to create your delicious Holiday Puppy Chow:

1. Prepare Your Workspace: Gather all ingredients and equipment. You will need a large mixing bowl, a microwave-safe bowl, and a baking sheet lined with parchment paper.
2. Melt Chocolate Mixture: In a microwave-safe bowl, combine the chocolate chips, peanut butter, and unsalted butter. Heat in the microwave in 30-second intervals, stirring in between, until smooth and fully melted.
3. Add Vanilla: Once melted, stir in the vanilla extract until well combined.
4. Combine Cereal: In a large mixing bowl, pour the rice cereal. Gradually pour the melted chocolate mixture over the cereal, stirring gently to coat evenly.
5. Add Powdered Sugar: Once the cereal is well coated, add the powdered sugar. Stir until the cereal is coated in sugar, ensuring every piece is covered.
6. Cool on Baking Sheet: Spread the mixture onto the prepared baking sheet in an even layer. Let it cool for about 10 minutes.
7. Add Sprinkles (Optional): If using sprinkles, sprinkle them over the top of the cooled mixture for a festive touch.
8. Break Apart: Once cooled, break apart any clumps to create bite-sized pieces.

These steps will guide you in making this incredible Holiday Puppy Chow effortlessly!