1Heat oven to 250°F. Adjust rack(s) to middle positions.
Measure out cereals, crackers, and pretzels into a very large bowl or roasting pan. Set aside.
2Put butter and oil in a large baking pan (I use large disposable roaster pans) and place in oven to melt butter. Once butter is melted, add all other seasonings and mix together well.
3Add cereal mixture and nuts to the pan with melted butter and seasonings. Mix VERY well, Lifting and stirring until almost all of the butter is gone from the pan and the cereal mix is very well coated evenly. Taste and adjust seasonings to your taste, adding more garlic, etc. (This mixing takes some time, but the better you mix, the better distributed the flavor.)
4Sprinkle half the parmesan over the coated mix, stir well. Add the other half and stir again.
Bake at 250° for 2 hours, stirring every 30 minutes.
Remove from oven and let cool completely. Store in air tight containers.
5Cereal and Cracker List: Chex (corn, wheat, oat, multi grain), Cheerios, Bugles, Cheezits, Goldfish, Ritz Bits, oyster crackers, Mini Triscuits, Vegetable Thins, Stix, Cheddarfetti(walmart), mini rice cakes. Just about any small unsweetened cracker or cereal can be used.