Warning: cake batter rice crispy treats. You will probably never make regular rice crispy treats again.3 Tbsp. butter 1 (10 oz.) bag of mini-marshmallows 1/4 cup yellow cake mix (the dry cake mix, not prepared into a batter!) 6 cups crispy rice cereal 1 (1.75 oz.) container of sprinkles Method: Melt butter in a large saucepan over low heat and add marshmallows. Stir until they begin to melt, adding in (dry) cake mix one spoonful at a time so its combined.