My mother is a baker and I make all kinds of cookie cutters for her. Here are some Alabama 'A' cookie cutters in two sizes (2inch and 3inch) I modeled. Would be great for fondant and probably also cookies!
Be advised, PLA is food safe, however, brass printer nozzles may contain tiny amounts of lead. That said, use at your own risk. Consider a steel nozzle if you're planning on printing a lot of cookie cutters. :)