Begin by adding the rice Chex cereal to a large mixing bowl, setting it aside for later use.
In a microwave-safe bowl, combine the white chocolate chips and creamy peanut butter. Microwave the mixture in 30-second intervals, stirring well after each interval, until it melts and becomes a smooth, homogenous mixture (this should take about 1-2 minutes in total).
Once melted, stir in the almond extract and a pinch of salt. This will elevate the flavor profile of your puppy chow.
Carefully pour the melted white chocolate and peanut butter mixture over the rice Chex cereal, gently folding it in with a spatula until every piece of cereal is evenly coated.
In a separate bowl, mix together the powdered sugar and granulated sugar until well blended.
Transfer the coated cereal into a large zip-top bag. Add the sugar mixture to the bag and seal it tightly. Gently shake the bag to ensure that every piece of cereal gets a good coating of the sweet sugar mixture.
Next, delicately fold in the colorful rainbow sprinkles, adding a festive touch and delightful crunch to your puppy chow.
Finally, spread the sugar cookie puppy chow onto a cool baking sheet lined with parchment paper, allowing it to cool and set completely.
Notes
For an enticing display, serve in individual cups or jars. Top each serving with extra rainbow sprinkles.