Birthday Cake Muddy Buddies

adapted from: Shanelle S.

1 (12 oz.) box Rice Chex cereal (12 cups)

2 (12 oz.) bags white chocolate chips

1 Tbl. shortening or coconut oil

1/2 (10 oz.) bag mini marshmallows, or more if desired

1/4 c. rainbow sprinkles

1 c. powdered sugar

1 c. dry funfetti cake mix

Add cereal and marshmallows to a very large bowl; set aside.  Pour the white chocolate chips and shortening into a medium, microwave-safe, bowl and microwave until melted, stirring every 30 seconds.  Stir until smooth and creamy.  Immediately pour over cereal/marshmallow mixture and stir together until all the cereal is evenly coated in white chocolate.  Stir in the rainbow sprinkles.  

Combine powdered sugar and cake mix and gradually add to cereal mixture while the white chocolate is still wet.  Stir together until all the cereal and marshmallows are evenly coated in sugar.  You may or may not use all of the powdered sugar mixture.  Add enough until the cereal is coated to your preference.  Allow white chocolate to set and serve.