Combine first 6 ingredients in a large roasting pan. In small sauce pan melt butter and margarine, add worcestershire sauce, garlic salt, garlic powder and onion salt, combine well. Slowly pour mixture over dry cereal, be sure to stir while coating. Bake at 250° F for 1 hour, stirring every 15 minutes. Store in an airtight container.
Servings: 4