Rice and Corn chex cereal - about 2 cups of each (I used Kellog's Chex Mix which includes both rice and corn chex, and then I use the entire box)
Pretzel sticks -I used about 2 cups
Honey roasted peanuts - I used about 1-1/2 cups
Halloween M&M's - use the entire bag, why not? There is another color combination that is more autumn colors that I use for a similar trail mix. Choose whichever feel you're going for.
White Baking Chips - again, why not use the entire bag?
You can see that this recipe is not exact. Mix it the way you want it.