Cooking With Grammy - Holiday Edition

Join Sandy and Caroline as they make a special treat for Santa - Santa Popcorn Crunch Bars. He's gonna love these! Merry Christmas Everyone!
Recipe:
Cooking spray - 4 spray(s)
6 cup(s) - Plain air popped popcorn (prepared without oil)
1 cup(s) Corn flakes
1½ oz, crushed (1 cup) Unflavored pretzel thins
1¼ oz, (1 cup) Baked potato chips
½ cup(s) Mini semisweet chocolate chips
2 cup(s)Mini marshmallows
1 Tbsp Unsalted butter
Directions:
Coat a 9-inch square baking pan with cooking spray. In a large bowl, toss the popcorn, cornflakes, pretzels, potato chips, and chocolate chips.
In a microwave-safe bowl, microwave the marshmallows and butter until melted, about 1 minute. Stir the marshmallows well and pour over the popcorn. Using a rubber spatula, toss the popcorn until well coated.
Press the popcorn firmly into the prepared pan. Let the popcorn cool completely before cutting into 12 bars.
Serving size: 1 bar