4 TBS unsalted butter
6 cups mini marshmallows
1 1/2 cups (12 oz) crunchy peanut butter
6 cups Rice Krispies
2 cups mini pretzels or pretzel sticks, broken into pieces
1 cup (8 oz) dark chocolate, chopped (or chocolate chips)
1/2 cup honey
1/2 cup corn syrup
Line a 9x3 baking dish with parchment and coat with nonstick cooking spray.
Melt butter in a large pot over medium-high heat. Add marshmallows and peanut butter to pot and cook, stirring occasionally, until mixture is melted and beginning to bubble, about 3 minutes.
Remove pot from heat. Stir in remaining ingredients until well combined. Transfer to prepared baking dish and smooth top using a spatula. Do not press into pan too hard. Cool to room temperature.
Use parchment to lift bars from baking dish. Transfer to cutting board and cut into squares to serve.