- Grease a 9x13-inch baking dish with butter and set aside. - In a large pot over medium heat, melt together the butter and marshmallows until combined. - Remove from heat and stir in the popcorn, peanuts, and pretzels until evenly coated. - Pour the mixture into the prepared pan and press down with a spatula until the top is even. - In a medium bowl, melt together the chocolate chips and peanut butter until creamy. - Spread the melted chocolate mixture over the popcorn mixture and spread until the top is smooth. - Let cool for at least 1 hour before cutting into bars. This Chocolate Peanut Pretzel Popcorn Bar recipe is a delicious treat that is easy to make and perfect for any occasion. The combination of salty and sweet ingredients creates a unique flavor that is sure to satisfy. Give it a try and enjoy! Happy cooking!