In a microwave-safe bowl, melt white chocolate chips and coconut oil or butter in 30-second intervals, stirring after each, until smooth. Avoid overheating.

In a large bowl, combine mini marshmallows and Rice Krispies cereal. Quickly pour melted chocolate over the mixture and stir to coat evenly.

Drop small spoonfuls of the mixture onto a parchment-lined baking sheet. Add holiday sprinkles for decoration.

Let the clusters cool and set at room temperature for 30 minutes, or refrigerate for faster setting.