Peanut Butter Butterscotch Popcorn Balls

Bahan-bahan (18 porsi)

• 1 & 1/4 cups butterscotch chips
• 5 tablespoons salted butter
• 1/3 cup peanut butter
• 6 cups big marshmallows (not quite 16 ounces)
• 12 cups popped popcorn (I used a 6 oz bag)