Ermm....
How can u have a "powdery" ice cream :S You mean like halva?
(Aquai, Wed 6 Jul 2005, 15:55, archived)

I don't know what halva is
but powdery ice cream is:

Ice cream but with a powdery texture - as though it has chalk dust in it.
( Johnny Catfish - Yowsa!, Wed 6 Jul 2005, 15:58, archived)