In a large bowl measure out your Rice Chex Cereal.
In a small microwavable bowl add the white chocolate chips, peanut butter, butter, and vanilla. Microwave it for 1-1½ minutes stirring every 30 seconds until melted.
Pour the chocolate peanut butter mixture over the Rice Chex and stir until evenly coated.
Place the Rice Chex mixture in a 1-gallon food storage plastic bag. Add the powdered sugar, seal the bag, and then shake until well coated. Let that sit aside for a few minutes.
Next, in another large bowl, or clean out the one you were using, add your Kashi Heart to Heart Oat Cereal, Valentine M&M's, and Valentine sprinkles.
Add your Rice Chex mixture back into the bowl and stir it all up.
Recipe by A Fireman's Wife at https://afiremanswife.com/2017/02/13/valentines-day-snack-mix/