Why is the Trix cereal powder dry even after being submerged in milk?

When I was in school, we'd have those little plastic bowls that have various cereals, Trix among them. I often wondered about the phenomenon that occurs when you finish the cereal and drink the milk, the powder at the bottom that consists of small fragments of the cereal is completely dry! It's baffling, and I can't find anything at all through multiple google searches about it!