Melt butter in a large heavy pot over low heat. Add marshmallows and brown sugar and stir until melted. Remove from heat.
Pour popcorn and cranberries, or English toffee bits if using, into pot; toss well. With buttered hands, shape into 2 1/2-inch balls. Set on parchment lined baking sheet to dry slightly.
Popcorn Balls
Russell "Chuckles" lunch idea.
Nutritious and Delicious!