I'm certainly no gardener and so I was completely taken by surprise when I discovered roots after a few days. I had simply forgotten about the cuttings which I had put into water to prevent them from wilting before I could use them.
So I decided to give it a try and planted them and here we go, they are thriving! One word of advice though: Do not plant the mint directly into your garden bed. It will grow rampantly and take over the whole bed!