Preheat oven to 250 degrees Fahrenheit. Line a baking sheet with Gefen Parchment Paper and grease with cooking spray.

Place popcorn in a large mixing bowl.

In a medium saucepan over medium heat, combine brown sugar, corn syrup, butter, and salt and bring to a boil, stirring occasionally.

Remove from heat and stir in peanut butter and vanilla.

Pour over popcorn and toss gently to coat.

Spread popcorn onto prepared baking sheet. Bake for one hour, stirring every 15 minutes.

Let cool completely.

Drizzle melted chocolate over the popcorn. Store in an airtight container.