Preheat your oven to 300°F. Cover a baking sheet with aluminum foil and set it aside.
In a saucepan over medium-high heat, melt the butter and mix in the brown sugar and honey. Let it simmer for 2-3 minutes until it turns into a caramel sauce.
In a big bowl, toss together the cereals, pretzels, and nuts. Spread this mixture evenly on the baking sheet. Pour the caramel sauce over it, making sure everything gets coated.
Bake for 25-30 minutes, giving it a few stirs during the process.
Take it out of the oven and let it cool completely on the baking sheet.
Transfer the delicious mix to a large bowl, add the remaining candy, and give it a good stir.
Keep it in an airtight container at room temperature for up to 2 weeks.