"Well this is... interesting."
The diplomat hurriedly wiped flecks of the melting milk-and-dwarven-sugar concoction out of his beard so as not to appear uncivilized.
"Aye! We've taken to calling it 'ice cream,' after the humans who have visited our fortress sampled it. No idea why they call it that." Vudok, the fortresses master chef replied delightedly. The two had been touring the fortress grounds at the suggestion of the Grand Monk, who it would appear was too busy in silent consultation with Armok to deal with the diplomat visitor for the time being. They were currently leaving the "Creamery" as it was known in the fortress and strolling across the Frozen Traverse, the center of the fortress' Temple District and Noble District.
"Perhaps they call it that because they eat it too fast, and the tooth pain is too much to bear for the poor, flimsy things?" The diplomat answered, now consuming his frozen treat with much greater gusto at the thought that Dwarven tongues could handle it far better than any silly surface dweller.
"That actually makes a lot of sense!" Vudok said gleefully as the two strolled in to the shrine where the Grand Monk was, hopefully, almost finished with his meditations.
So my glacier fortress is now mass-producing Dwarven ice cream after the discovery that milk freezes when outside here and the frozen milk lumps are used in the kitchen without further issues. It was a natural extension to add dwarven sugar which, currently, I'm importing in vast quantities. I'm quickly shifting it into the primary trade export. Frozen dwarven treats for all!