Grease a 13x9x2-inch baking dish with non-stick cooking spray and set it aside.
In a microwave-safe bowl, melt the butterscotch chips and chocolate chips together in the microwave, stirring every 30 seconds until smooth and fully melted.
Stir in the peanut butter until well combined.
Fold in the miniature marshmallows and salted peanuts until evenly distributed throughout the mixture.
Pour the mixture into the prepared baking dish and press it down evenly with a spatula or the back of a spoon.
Refrigerate the bars for about 1 hour, or until firm.
Once chilled and set, cut the bars into squares and serve.
Notes / Tips / Wine Advice:
Wine Advice:
Enjoy these indulgent double chocolate peanut butter nut bars with a glass of rich Cabernet Sauvignon or a creamy Malbec to complement their decadent flavors.