Serving Creme Brulee to a large group of people I have 60 creme brulees set in mason jars. The idea is to serve this to a group of 60 people at once. How do I ensure my crust for the first one doesn't get soggy? 
Each creme brulee, from opening to torching takes about 30-60 seconds. This means the first one could end up sitting for 30-60 minutes before all are complete. This will definitely get the crust soggy by the time of service. 

Any ideas on preventing this?
To be honest I wouldn't have thought the top would get soggy. I've also made hundreds of brûlées for wedding parties in the past and the top has never gone soft. Unless you're putting them in the fridge between colorizing and serving? That will definitely cause problems.

If you are actually getting a soggy top it means one of two things:


You've not browned them enough.
You've not used enough sugar on the top.


One thing I could suggest if you are doing so many in one go, something I learnt quite late into being a pastry chef (6 months of a two year stint): make a nice perfectly coloured caramel, leave it to cool a little, but keep warm. Then when you need it just pour it over the top of your brûlées as you're serving. 

Be sure to use glucose in your caramel to stop it setting too hard, as it may splinter and kill a couple of your guests.