Even though this Chex Mix is made in the oven, we're not really baking it. We're just drying the butter and Worcestershire sauce so the spices and seasonings stick to the Chex and pita chips. If your Chex Mix burned that means your oven is running hot (this is why I always recommend having an oven thermometer!) and you need to use a lower oven temp — you can go as low as 200F! It will just take a little longer, but at least it won't be burned. And make sure you are shaking the pan every 10-15 minutes so that all the pieces are being evenly exposed to the heat.