Add Crispix, nuts, pretzels and Cheerios to a large sheet pan.TIP: You'll want a single layer of ingredients on your baking sheet. If your baking sheet is too small and this is not possible, you'll want to split the mixture between two baking sheets.
In a small saucepan, melt butter over low heat. Add remaining ingredients to melted butter and whisk to combine.
Pour butter and seasonings over cereal mixture. Toss to combine.TIP: I like to pour the butter and seasonings directly over the cereals as they tend to absorb it more than the pretzels and nuts.
Bake for 45 minutes at 250 degrees, stirring every 15 minutes.