Preheat oven to 300°F (150°C)

Melt the white chocolate chips in a double boiler or in the microwave in 30-second increments, stirring between each interval, until smooth

Pop the popcorn kernels in a large pot or a popcorn maker until all kernels have popped

Mix the popped popcorn, melted white chocolate, and sprinkles in a large bowl until the popcorn is well coated

Spread the popcorn mixture on a baking sheet lined with parchment paper

Allow the mixture to cool and harden for about 10-15 minutes

Break the popcorn into chunks and serve