10/04/2011 10:45 am ET Updated Dec 04, 2011

Herman Cain 2012: 'Black Walnut' Isn't The 'Flavor Of The Week' (VIDEO)

Herman Cain says he's more than the "flavor of the week."

Commenting on "Fox and Friends" Tuesday morning on a new Washington Post/ABC News poll that shows his numbers rising, he said, "That is great news that says the 'flavor of the week' might have some substance."

"Black walnut isn't a flavor of the week," he continued. "I can eat black walnut all the time -- it's not a flavor of the week! It's not that heavy. You can eat it on the cone or in a cup," he joked. Herman Cain's new book, This Is Herman Cain!: My Journey To The White House, is also being released today.

Former Alaska Gov. Sarah Palin called Cain the "flavor of the week" last week, a comment she subsequently clarified.

Cain called himself "black walnut" on "The Tonight Show With Jay Leno" Friday. "I'm Häagen-Dazs Black Walnut," joked Cain. He went on to say that that flavor "lasts longer than a week."

Cain has also weighed in on New Jersey Gov. Chris Christie. "I think he has more liberal positions that a lot of people don't know about yet," he said on "The Sean Hannity Show" Monday night. "I've talked to some people in New Jersey who live there and they say he has a lot of liberal positions. I don't know all of them, but I think all of that would come out." Cain acknowledged that Christie would likely get a lot of media attention, but said on "Fox and Friends" that his own momentum would not be affected.

"At the same time, you'll see black walnut moving up the charts."