Brown sugar gets hard when its moisture escapes. The best way to keep brown sugar soft is to use a small clay disc and it works really well. Here’s an example below… It costs less than $5 and you just soak the disc in water for 15 minutes and then put it into a fresh bag of brown sugar. Seal up the bag tightly and you’re done. Mine stays soft until I finish the bag. You can even use a piece of broken clay from a pot as long as it’s unglazed.
