I've just made my Christmas pudding but I have got muddled between the size of my pudding basin and the amounts I used - I think I may have put a 2 pint recipe in a 3 pint bowl, I'm not sure. My question is - how much will the pudding expand when cooked? At the moment there's about an inch of space between the pudding and the top of the bowl - is that enough room for expansion or will it overflow when it cooks? I'm not sure how far to the top I should fill it... I need to cook it ASAP so any advice very gratefully received!!