Wannabe Husband Killer Dalia Dippolito: I'm Releasing a Cookbook!

She was sentenced to 20 years in prison for hiring a hitman to murder her husband -- but now, failed husband-killer Dalia Dippolito is cooking up a new scheme ... a book full of delicious recipes!

You’ll remember ... Dalia was convicted in June of soliciting to commit first-degree murder -- after her 2009 arrest, when caught paying an undercover cop to kill her hubby of 6 months.

29-year-old Dalia is now serving house arrest while waiting out an appeal to the 20-year sentence -- and in the meantime, she's keeping herself busy ... putting together a cookbook of her favorite recipes.

Dalia tells TMZ, she "poured [her] heart and soul into" the book -- which she describes as "a combination of cooking, health and nutrition, self-help, decorating and humor with a modern twist."

Right now, she's looking for a literary agent to help lock down a deal -- adding, "I want to teach people that you can bring the sexy back in the kitchen regardless of whatever you have going on in your life."