Mix all three Chex cereals, Cheerios cereal, pretzel sticks, and mixed nuts in a 6-quart or larger slow cooker.
Whisk together vegetable oil, Worcestershire sauce, seasoned salt and garlic powder and pour over cereal mixture. Mix well.
Cook uncovered on high for approximately 90 minutes, stirring frequently.
Turn the slow cooker down to low and cook for an additional 20 minutes, again stirring frequently.
Spread on a cookie sheet to cool.Gluten Free
Substitute gluten free pretzels, and swap out the wheat chex for more gluten free rice chex. Also switch out the cheerios for your fav Gluten free o's.