I've heard from different sources that one of these two levels is where you stop burning lobster for sure. I want to make dead certain because I don't want to burn lobster when I start catching and cooking them.

http://tip.it/runescape/?page=cooking_guide.htm

 

 

 

74 without cooking gaunlets from Family Crest quest. 68, with those gauntlets.

While unaided it is a cooking level of 74 to stop burning lobsters. :)