Why Christianity?

[Pyrrho]

No no no. Who said the Flying Spaghetti Monster consisted of matter. His all mighty Meatballs are made of pure goodness, not matter. His all mighty noodles are made of pure joy and happiness, not matter.

So, Brahma, Yaweh, and THE FLYING SPAGHETTI MONSTER!

Please provide the church's official doctrine of the nature and essence of the FSM and of the creation account.

There is no doctrine that requires belief that the FSM is made of matter.  Here are a couple of quotes:

Pastafarianism is a real religion. 

Most of us do not believe a religion – Christianity, Islam, Pastafarianiasm – requires literal belief in order to provide spiritual enlightenment. That is, we can be part of a community without becoming indoctrinated. There are many levels of belief. 

By design, the only dogma allowed in the Church of the Flying Spaghetti Monster is the rejection of dogma. That is, there are no strict rules and regulations, there are no rote rituals and prayers and other nonsense. Every member has a say in what this church is and what it becomes.

Pastafarianism is different than most religions in that we explicitly make the point that our scripture need not be believed literally.

http://www.venganza.org/about/

So even if there were an explicit claim that the FSM were made of matter (though I do not recall ever seeing it as part of official Church doctrine), no member of the Church of the Flying Spaghetti Monster is required to believe it.

Here, though, is the official creation account (that no member is required to believe literally):

Q: How do Pastafarians believe our world was created?

A: We believe the Flying Spaghetti Monster created the world much as it exists today, but for reasons unknown made it appear that the universe is billions of years old (instead of thousands) and that life evolved into its current state (rather than created in its current form). Every time a researcher carries out an experiment that appears to confirm one of these “scientific theories” supporting an old earth and evolution we can be sure that the FSM is there, modifying the data with his Noodly Appendage. We don’t know why He does this but we believe He does, that is our Faith.