This caught my attention -- I never heard before (except now also, from Songbird76) that milk can be frozen for use later. Do you freeze it in plastic cartons? Does it thaw in the regular refrigerator section overnight, if you want to use it in the morning? How long (weeks, months) can you keep it frozen, before you have to use it?
When I was a kid, my mother sometimes bought powdered milk, which I thought tasted gross. Occasionally, she'd mix up some and do a half and half portion with regular milk, to help stretch the family's food budget (family of 6). (The half and half solution wasn't quite as bad tasting, as drinking it by itself.) Eventually, she gave up on the powedered version, but did use it for baking, if milk was included in the ingredients. With it cooked in something, you wouldn't taste any difference.