If you take your cookies out and they are still quite soft, don't put them back in because while they are cooling they will harden. Try substituting the chocolate chips for nuts or add a pinch of sea salt (seems weird but it works).
Brilliant and so easy to make - 8 mins in fan oven is just about right! - 30 Jun 2013
very easy and they were eaten in about 10 mins really good, i gave them 8 mins in my fan electric oven and they were still soft in the middle. - 11 Apr 2013
They are amazing! Everybody loved them! Easy and quick! - 07 Aug 2013