You need to keep the burn well cooled and iced immediately after the burn. Then use plenty of aloe vera gel on it. It probably won't leave a permanent scar. I burned myself on a steamer at my work (a restaurant) and gave my self a good three inch blister. It took over a year to go completely away.

Make sure once the blister pops you keep it very clean.....if it becomes infected, you will have to see a doctor for treatment.