Prepare the popcorn. Pop the popcorn and remove any unpopped kernels. Transfer the popcorn to a large mixing bowl.
Melt the chocolate. In a microwave safe bowl, melt the almond bark or white chocolate in 30 second intervals, stirring well between each, until smooth.
Flavor the chocolate. Stir the crushed peppermint candies into the melted chocolate until evenly combined.
Coat the popcorn. Pour the peppermint white chocolate over the popcorn and toss gently until evenly coated.
Add mix-ins. Add the peppermint candies, mini marshmallows, red sugar sprinkles, and flaky sea salt if using. Toss gently to combine.
Set and serve. Let the popcorn rest for 5 to 10 minutes until the chocolate sets before serving.
Notes
Popcorn choice. Any popcorn works, including plain, salted, buttery, or kettle corn, depending on your preferred sweet and salty balance.
Freshness. This popcorn is best enjoyed fresh, though it will keep for up to 3 days in an airtight container at room temperature.
Freezing. Freezing is not recommended, as peppermint candies become chewy and the colors may bleed when thawed.