Preheat oven to 225 degrees Fahrenheit. Position rack in the centre spot.
In a 6 cup capacity bowl melt butter and add Worcestershire sauce. Stir well and set aside.
Mix all spices together in a shaker. (Empty spice jar.). Set aside.
In a very large vessel, I use a very clean kitchen sink, combine nuts, pretzels, crackers and cereal.
Ladle one ladleful of the butter mixture over the cereal mixture then sprinkle a little of the spice mixture on top. Toss to coat. Ladle another ladleful of the butter mixture over cereal, sprinkle with seasonings and toss to coat. Repeat these steps until all ingredients have been combined. This method stops clumping of spice in the Chex and Cheerios.
Divide the mixture into 2 large turkey roasting pans, either aluminium or enamel. I use both the top and bottom of a large rectangular enamel roasting pan.
Place one pan in the oven, uncovered for one hour. Stir every 20 minutes.
Now, cover the pan with foil, place back in the oven for 1 more hour, stirring every 20 minutes.
Repeat for additional pans of snack mixture.
Allow mixture to cool thoroughly before placing in air tight containers to store. This recipe freezes well.