In a large saucepan over medium heat, combine the granulated sugar, corn syrup, and butter. Stir until the mixture comes to a boil, then reduce the heat and let it simmer for about 5 minutes without stirring.
Remove the saucepan from heat and stir in the vanilla extract and salt.
Add the mini marshmallows and stir until they are completely melted and the mixture is smooth.
Fold in the roasted peanuts and crispy rice cereal until everything is well combined.
Line a 9x13-inch baking dish with parchment paper, leaving some overhang for easy removal. Pour the nougat mixture into the prepared dish and press it down evenly with a spatula.
Allow the nougat to cool at room temperature for about 30 minutes.
Once cooled, melt the chocolate chips in a microwave-safe bowl in 30-second intervals, stirring until smooth.
Pour the melted chocolate over the cooled nougat and spread it evenly.
Let the chocolate set at room temperature or refrigerate for about 15 minutes.
Once the chocolate is firm, lift the nougat out of the dish using the parchment paper and cut it into bars.