I like figs and figgy pudding would be fine without the suet, but this is a delicious alternative for a festive Christmas pudding cake and persimmons are still available in some markets today. I purchased mine at Pike Place Market, in Seattle but Whole Foods carries them too. You will need a decorative Christmas mold/mould that comes with a clip-on top.
This tastes very similar to an applesauce cake and I suspect you can make that cake in a Christmas mold too. I have also made this with a lemon sauce drizzled on top but the confectioners' sugar looks so old fashioned.
Add the persimmon pulp and beat to combine.
The top should spring back when touched.