It is called quesillo because it looks like a cheesecake, but it has no cheese at all, it only contains condensed milk, liquid milk, powdered milk, vanilla extract, eggs, that is placed in a pot with another pot full of water and put it in the oven, before a caramel is made to give it that appearance, it is very delicious, but as I said it is called quesillo because of its appearance.
!BBH
Oh that's very interesting and it actually looks like a cheese wheel, now I get it 😲
I just realized this recipe is also called Flan in English.