We have always taken Christmas cake and Christmas puddings with us when visiting for Christmas as we have not seen traditional UK style cakes and puds in the shops. If you are making the puddings then you should not make them with beef suet use either vegetable suet or eg Stork marg as beef products cannot be taken through. We also used to take homemade mincemeat to make some pies as well. I did send my recipes through to the relevant government department and got the okay to take them before doing so.