In a large bowl, combine the popcorn, peanuts, and raisins. In a large saucepan, melt butter over low heat. Stir in the marshmallows and chips until melted and smooth. Pour over popcorn mixture and stir until evenly coated. Immediately pour into a greased pan (9x13) and press down evenly. Cool before cutting.
Cut into bars and store in an air-tight container
You can also use chocolate chips, peanut butter chips, or cinnamon baking chips.