Toss the chocolate melting chips (both white and regular) and dark chocolate chunks into your slow cooker.

Let it slow cook on low for an hour, then give it a good stir. (Pro tip: use a slow cooker liner for easy cleanup!)

Add in the rice cereal and crushed sandwich cookies. Gently stir to combine, being careful not to break up the cereal too much!

Scoop small clusters of the puppy chow and place them on a baking sheet lined with wax paper.

Coat the clusters with powdered sugar.

Pop them in the fridge or freezer for about an hour, or until they're nice and firm. Then, serve and enjoy your delightful homemade treat!