Mariah Carey's cookie outfit

Singer Mariah Carey performs during the 2008 Fashion Rocks concert to begin the 2009 Spring/Summer Fashion Week in New York September 5, 2008.[Agencies]

Mariah Carey wants to dress up as a chocolate chip cookie for Halloween.

The 38-year-old singer is considering several costume options for the spooky holiday, and is adamant she and husband Nick Cannon, 28, will have matching outfits.

Mariah told Us Weekly magazine: "One option is a sexy firefighter and Nick can be a regular firefighter guy. Then we have an Egyptian. The third idea takes a little imagination here... I would be a chocolate chip cookie.

"It's just like a two-piece little number, and it's made out of the chocolate chip cookie fabric. Then you have actual cookies sewn on.

"Nick made this up and he was only kidding, but I liked it. He would be a milk carton with a 'missing' sign over his head."

Mariah and Nick aren't the first celebrity couple to adopt a his-and-hers theme this Halloween.

Earlier this week, Gwen Stefani and husband Gavin Rossdale attended Kate Hudson's annual Halloween party dressed as a fried egg and bacon rashers respectively.

Married couple Courteney Cox and David Arquette also partied with Kate, in matching witch and warlock costumes.