I think that would be cool! ig

4 and a half hunger (1/10th of a full one)
It would grant the advancement Ice And Fire

yknow, cuz its in the nether

If you want to you could add an entire frozen dessert family of dishes
Maybe it should grant the advancement A Song Of Ice And Fire

and please update the textures on the blackstone workstations i really dont like then to be just darker versions of thier normal cunterparts