There is no hard and fast rule about how long you cook them for as it depends how thick you cut them. If you do skinny ones, I find that 30mins is enough but if you like big fat wedges, then you need to cook them for about 45 - 60 mins. The best advice is to keep checking them every 15 mins to see whether they are burning. Adding salt to them about 20 mins before you start cooking helps to make them crispy as the salt draws out the moisture in the bns. I then dab them with kitchen roll to dry them out before sticking them in the oven. Cooking them in the microwave for a few mins like princesspea suggested works too. I love these and had a huge bowl of them for dinner the other night when I only had 1pp left for dinner (whoops!!)