Probably not, but it can't hurt to ask when you're there. Most kitchens are staffed and stocked to handle the expected number of sit-down diners, and my experience has been no. YMMV.
I have been able to get the cheese soup at Le Cellier as take out several times. If you ask at a time when they are not too busy you can get lucky. Of course this was prior to it becoming "The" restaurant to eat at.