Step 1: Measure out 9 cups of Rice Chex cereal into a large mixing bowl. Set aside.
Step 2: In a food processor or blender, pulse the freeze-dried strawberries until they form a fine powder. You should have about 1/2 to 3/4 cup of powder. Set aside.
Step 3: In a medium microwave-safe bowl, combine the white chocolate chips and unsalted butter. Microwave in 30-second intervals, stirring well after each, until completely melted and smooth. This usually takes about 1-2 minutes total. Be careful not to overheat the white chocolate, as it can seize.
Step 4: Stir the vanilla extract and cream cheese powder (if using) into the melted white chocolate mixture until fully combined.
Step 5: Pour the melted white chocolate mixture over the Chex cereal in the large mixing bowl. Gently fold with a spatula until the cereal is evenly coated. Work quickly before the chocolate sets.
Step 6: In a large gallon-sized resealable plastic bag, combine the powdered sugar and the freeze-dried strawberry powder. Shake the bag well to mix the powders thoroughly.
Step 7: Carefully transfer the coated Chex cereal into the bag with the powdered sugar and strawberry mixture. Seal the bag, ensuring there’s plenty of air inside.
Step 8: Shake the bag vigorously for 2-3 minutes, tossing and turning, until all the cereal pieces are completely coated with the pink sugar mixture. This is the fun part of making easy strawberry shortcake puppy chow!
Step 9: Spread the easy strawberry shortcake puppy chow out onto a baking sheet lined with parchment paper or wax paper to cool and set. This will prevent clumping. Once cooled, it’s ready to serve!