look it up at wilton.com...I think it can be used for just about anything, even ice cubes, or frozen cranberry cubes for the punch bowl..BUT before I would make brownies in it, I would make sure it is meant for the oven as well!
I found you really need to keep the cardboard band that comes on these to make sure you know what they are for and how to care for them. THey are not all created equal I have found!
Show us what you used it for!