Well we were lucky to have food at all at my mum's, despite me repeatedly asking what I should bring. "oh just whatever you think I will forget" was her helpful reply. So her fridge had in it a turkey crown, gammon joint, some potatoes, half a swede, eggs, milk, yoghurts and some cheese sauce. Oh and 1 bottle of wine. That is literally it for me, dh & the 2 dd's staying for 2 nights. No party/snack food. The cupboards had some pasta, walkers crisps and some nuts. Plus she had unexpectedly go to work for 3 hours so I made Xmas dinner, as I knew I would have to. We had frozen cheese cake for pudding.
Fortunately i bought mince pies, homemade brownies, carrots and parsnips, cava, satsumas, bananas, Yule log, pop corn,cheese (oh yes, I suggested she get crackers for cheese. She got a pack of Jacobs cream crackers). I also bought croissants for breakfast (she didn't have jam). I had to go begging to a neighbour for some flour to make yorkies.
Some how I managed to feed us, plus various siblings, out of the food for 2 days. I'm like fecking Jesus and the loaves and fishes!
It's just a shame, as for me Xmas is about lovely home cooked food, and not just the, admittedly copious, presents she bought.