Place the green
tea powder in a bowl, add the cognac and mix well.
Pour the fresh
milk, cream, milk powder and sugar into another bowl
and mix well. Transfer to a saucepan and bring to a
boil over moderate heat. Remove from the heat and
allow to cool to a lukewarm temperature, then add
the green tea mixture and mix well.
Chill immediately
in the freezer portion of the refrigerator until ice
crystals start to form around the edges of the
container. Pour the mixture into a blender or food
processor and blend for a few seconds to break up
the crystals.
Leave the mixture
to freeze in a plastic container. For an interesting
variation, serve green tea ice cream topped with
sweetened azuki beans.