Pour the popcorn into a large bowl and remove any un-popped kernels

Place the chocolate melting candy and peanut butter in a medium microwave-safe bowl. Microwave on medium power for 1 minute. Stir until melted and smooth. If needed, add additional heating time in 30-second increments, stirring after each time, until the candy is melted and smooth.

Pour the melted candy over the popcorn. Add the peanut butter cups to the bowl. Using a large rubber spatula, gently stir to coat.

Spread the popcorn mixture on a large piece of parchment paper or a large silicone baking mat.

Allow to cool until the chocolate coating has hardened, about 20 minutes. Break into pieces before packaging or transferring to a bowl to serve immediately. The popcorn may be stored in an airtight container for up to 4 days.