Generously spray a 9x13 inch backing pan with nonstick cooking spray.

In a large microwave safe bowl, combine butter, marshmallows, and peanut butter.

Microwave on high for one minute. Stir until smooth. If not completely melted, return bowl to microwave and heat for another 20 seconds.

Pour in Honey Nut Cheerios and stir until combined.

Pour mixture into pan and spread and flatten with the back of a wooden spoon.

Allow to cool and set for 30 minutes.

Once set, spread dulce de leche or carmel sauce over bars.

Melt chocolate chips and cream in the microwave for 30 second increments, stirring in-between, until melted.

Once smooth, spread chocolate over the bars and sprinkle with coarsely chopped pretzels and peanuts.

Allow chocolate to set, then cut into squares. This pan makes 12 good sized squares.