Scaling up a crumble for Christmas?

[msrisotto]

I'll be making this Rhubarb Crumble on Christmas day. I've made it once before, it's perfect. However i'll need to times the recipe by 3, to feed 11 people. I'll be using a bigger dish obviously, so I was wondering if I needed to increase the cooking time. What do you think? Also, i'll be using a fair proportion of defrosted Rhubarb, do you think that will make a difference? TIA

I'd make two, not one enormous one - if you increase recipes quantities you generally need to cook them for longer and cooler but too much longer and cooler will mess up the cooking. I would think that two each about 50% bigger than you usually make should be okay at the time and temp that recipe uses - crumble's lovely and forgiving!

Yeah that's probably a good idea