Preheat the oven to 325°F.
Prepare a large baking sheet by lining it with parchment paper and spraying with oil.
Mix together the pretzels, popcorn, peanuts, and marshmallows in a bowl or on your prepared tray.
3 cups mini pretzels, 5 cups popped popcorn, 3 cups mini marshmallows, 1 cup roasted salted peanuts
In a small saucepan melt the butter, corn syrup, and brown sugar together.
1 cup brown sugar, ½ cup salted butter, ⅓ cup corn syrup
Bring the mixture to a boil, and let boil for 3 minutes.
Remove the mixture from the heat and immediately pour evenly over the popcorn mixture, mix quickly to coat. Don’t worry if you don’t coat everything you will get another chance.
Put in the oven and bake for 10 minutes, take the mixture out and carefully mix everything around. Put back into the over for another 10 minutes, take the mixture out again and toss one more time, then let sit to cool.
Once cool, break apart into bite size chunks and toss in a serving bowl with the remaining ingredients.
½ cup dark chocolate chips, ½ cup Reese's Pieces, ½ cup candy corn, 2 Tablespoons candy eyes, 2 Tablespoons orange sprinkles, 2 Tablespoons black sprinkles
Serve immediately or put in an airtight container and store in a cool place.