We love popping our own popcorn. It's super easy to make and we like it a lot better than bagged popcorn. But, use what you have. If you have popping corn, microwave popcorn, or bagged popcorn, just go with that. Any of would work in this recipe. Just keep in mind that those different popcorns have different flavoring. Popping corn is plain, microwave popcorn has lots of butter flavoring, and bagged popcorn is somewhere in between. So, you may have to add a pinch of salt or use a varying amount of chocolate to get the flavoring you want.