How to Soften Brown Sugar in 20 Seconds from CupcakesAndCrinoline.com, I do this and it actually works! I have since started making my own brown sugar (one less container in my pantry and I know it's fresh every time!)
A Simple Way to Soften Hard Brown Sugar in a Hurry | Kitchn
How to Soften Brown Sugar If you need it now: place the brown sugar in a microwave-safe bowl, and cover it with a damp paper towel. Microwave in 20-second increments... *** Tried it this morning and it works like a charm!