Place the cereal in a large bowl and set aside.
10 cups Crispix Cereal
Melt the chocolate chips, Andes Mint Chips (if making mint puppy chow), peanut butter, and butter in a medium-sized saucepan over low heat.
1 cup milk chocolate chips, 1 cup Andes Creme de Menthe Baking Chips, ½ cup creamy peanut butter, 8 tablespoons unsalted butter
Add the vanilla and stir.
½ teaspoon pure vanilla extract
Pour the chocolate mixture over the cereal and stir gently until well coated.
Place half of the powdered sugar in a large plastic container which has a lid.
3-4 cups powdered sugar
Place all of the chocolate-coated cereal in the container.
Cover with the other half of the powdered sugar and seal tightly.
Shake gently (upside up and down) until the cereal has been evenly coated with powdered sugar.
Spread onto waxed paper to cool and dry completely.