Preheat the oven to 250F and place the stick of butter in a large pan with a lip. Put it in the oven to melt.
When the butter is melted add in the Worcestershire sauce and the seasoned salt. Stir to create the butter sauce.
Add in the chex and stir to coat them. Bake for 12 minutes.
Add in the nuts and stir to combine. Bake for another 12 minutes.
Add the pretzels and stir, baking for another 12 minutes.
Bake for 12 minutes one last time before setting out to cool.
Serve immediately or store in an airtight container for up to 3 weeks.
The pan we prefer for this recipe is this XL sheet pan.