Begin by popping your popcorn using your preferred method, aiming for about 10 cups of popped popcorn.

In a large pot over medium-low heat, melt ½ cup of unsalted butter. Add 4 cups of miniature marshmallows, stirring until smooth.

Remove from heat and pour the melted marshmallow mixture over the popped popcorn, gently stirring to coat.

Let the mixture cool for a couple of minutes before folding in 1 cup each of M&Ms and festive sprinkles.

Lightly spray hands with non-stick cooking spray and form about 12 balls from the mixture.

Place popcorn balls on a lined baking sheet and let them cool at room temperature for about 30 minutes.