David Burtka has a new cookbook -- and ET couldn't think of anyone better to interview him about it than his husband, Neil Patrick Harris!
The spouses sat down for a hilarious and heartfelt discussion about Burtka's new endeavor, where they opened up about his favorite sous chef and the one celebrity he'd like to invite over for dinner.
"One celebrity you're dying to have over for a party? Please say Shawn Mendes! Please say Shawn Mendes!" Harris pleaded.
"Nick Jonas," Burtka answered. "Or Shawn Mendes... I mean, we had Oprah [Winfrey] over for pizza."
"Who gets to say that?" Harris asked.
"Martha Stewart might be fun. She's pretty amazing and savvy and saucy," Burtka suggested.
As Harris noted, however, Stewart might come as a package deal. "She knows a lot. She'd pass judgement, but if she brought that Snoop Dogg," he said.
"Both of them together? I don't think I'd remember it," Burtka joked.
While Harris is full of ideas, it's the couples' 8-year-old twins, Harper and Gideon, whom Burtka says are most helpful in the kitchen. "Between the two children or you?" Burtka asked. "I mean, it's your job just to do the dishes."
The chef -- who graduated from Le Cordon Bleu in 2009 -- is all about making cooking a group activity. He said his cookbook, Life Is a Party, was all about "creating special moments for people."
"I think that all we have to go on is memories and creating moments for other people and the social aspect of having get-togethers and being together and not taking life for granted and not and enjoying life as much as possible [needs to be remedied]. So I really wanted to put together ideas that we share and with our kids to create special moments and memories people can live with the rest of their life," Burtka explained.
"I'm excited for people to take the recipes and get the tips and learn about different ways you can make ingredients fun," he continued. "Getting your friends involved, and getting your kids involved and being able to create special moments -- I think that's really, really exciting. If people could take some great advice in terms of how to celebrate with each other, that just makes me feel really happy and warm inside."
Life Is a Party: Deliciously Doable Recipes to Make Every Day a Celebration is now available where books are sold. See more on Burtka and Harris in the video below.