This recipe comes from my sister Amy. She made it for me for Valentine's Day one year. Her recipe included just popcorn and M&Ms, and it was really good, but there are other possible add-ins. Whatever extra ingredients you throw in, this is delicious and easy!
2 bags microwave popcorn, popped and with unpopped kernels removed
1 12-ounce bag white chocolate chips
1 medium package regular or peanut M&Ms (about 1 1/2 cups)
Could also add miniature marshmallows, pretzel sticks, etc.
Put popped popcorn in a bowl along with any add-ins. Melt white chocolate chips in a microwave, 45 seconds at a time, stirring each time until the chips have melted completely. Pour the melted white chocolate over the popcorn. Stir until thoroughly combined. Stir in M&Ms. Then spread the popcorn out on a cookie sheet. Refrigerate for 10 minutes or more, until chocolate has hardened and popcorn breaks in pieces.