In a medium bowl, mix the condensed milk with the vanilla and a pinch of salt and set aside.

In a small bowl make a paste with the Ube powder and hot water to form a loose paste. Mix this into the sweetened condensed milk mixture.

Whip the cream using chilled equipment (bowl and whisk in the freezer for 10 min.). Whip on high speed until stiff peaks form. Fold one cup of the whipped cream into the sweetened condensed milk. Fold in the rest until well combined.

Place the mixture into a 9x5x3" pan, cover lightly and freeze.

Let the ice cream soften before trying to scoop it.