Court papers say Valle's would-be dining partner -- who used the screen name "Moody Blues" -- boasted that he'd feasted previously on "a black woman and a white child."

"I've not had a young white woman. Looking forward to it," Moody Blues added.

Valle -- who said he hadn't eaten anyone before -- replied, "Excellent," according to the Manhattan federal court filing.

Prosecutors also cited the following exchange:

Moody Blues: "If we get someone...and we finish the meat early, would you go for another?"

Valle: "Yeah. I think we would have to give it time though."

Moody Blues: "Why? Go for a completely different type. I'd love to eat another child."

In addition, court papers say Moody Blues noted: "I also love roasting whole pelvises, mind you only did with the little one so far."

Prosecutors revealed the chilling back-and-forth in response to a request by Valle's lawyers to bar introduction of evidence "in which Moody Blues appears to recount times in his past he he has cannibalized children."