So imagine you bought a large milkshake, any flavor, to go. After enjoying about half of it, you realize you aren't going to finish it. But, this is a great milkshake. What to do? Luckily, you are at home, so you put it in the freezer. Then the next day, after lunch, you decide to have the rest of it.
But, how best to turn your frozen-solid shake into what it once was? There is no "auto-defrost-milkshake" button on the microwave. If you zap it like it's food, the shake-matter gets hot on the outside and the middle remains frozen. If you defrost it, you could end up with flavored milk. Hot shake is not tasty. Frozen shake is undrinkable.
So, how do you get it to return to the right consistency? Or can you? Was it better to just let it go the night before?