Popcorn Balls with Peanuts and Raisins

In a medium nonstick saucepan, melt 2 tablespoons butter over low heat. Add 1 bag (10 ounces) mini marshmallows; cook, stirring, until melted, 10 to 12 minutes. In a large bowl, combine 12 cups plain unsalted popped popcorn (from 2/3 cup kernels), 1/2 cup unsalted peanuts, and 1/2 cup raisins (be careful not to mix in any un-popped kernels).

Pour melted marshmallows over popcorn mixture, and fold to combine. You will need to work quickly since the sugar in the marshmallows hardens as it cools. Rub a little butter into your hands to prevent sticking, and gently form 12 balls, each about 2 1/2 inches across; place on waxed paper. Let set until cool and firm, about 10 minutes.