Jill Biden just revealed the secret behind her family-favourite chicken parmi recipe

Democratic presidential candidate Joe Biden has just unleashed his biggest election secret weapon to date — his wife's home cooking.

In a partnership with Tasty, yesterday Dr Jill Biden shared her family recipe for a chicken parmi — referred to as a 'chicken Parmesan' in the States.

The three-minute clip, funded by the Biden for President campaign, sees the former second lady waxing lyrical about the recipe she learned from her grandmother, no doubt angling that family vote.

"Food is love, it's the way you show love to your family," Dr Biden begins.

"Every Sunday smells of tomato and basil and garlic filled the house and I have so many memories. So I've adopted that tradition with my own family," she explains before describing the heirloom recipe in mouth-watering detail.

Of course, the detail that stood out the most was Dr Biden's decadent twist on the classic parmi crumb.

"Mix the breadcrumbs with the mozzarella and the Parmesan — that's what gives it the flavour," she reveals.

Yes, you heard correct — she adds extra mozzarella to the crumb base. And you know what that means? An extra, crispy layer of fried cheese underneath all that melted mozzarella and rich tomato sauce.

Watch the snippet above for a drool-worthy peek at the recipe, or check out the full Tasty recipe and tutorial.

It's not the first time the spouses of presidential candidates have used food or baking as a way to garner votes and public support.

In fact, US magazine Family Circle used to run quadrennial presidential cookie contests between the wives of presidential candidates — even once wrangling former president Bill Clinton for the bake-off in the year Hillary Clinton ran (he went with a choc chip, in case you wondered).

The competition actually came about following controversy in 1992, when political spouse and high-powered career woman Hillary Clinton responded to a question about her profession, saying: "You know, I suppose I could have stayed home and baked cookies and had teas, but what I decided to do was to fulfill my profession, which I entered before my husband was in public life."

The backlash was swift, with the public viewing it as a swipe against stay-at-home mums.

The enterprising magazine used the gaffe as an opportunity to start the cookie contest tradition — which was going strong until the magazine ceased publication late last year.

In any case the tradition that began as a PR stunt will not be missed by some. Some critics have called the death of the presidential cookie contest appropriate for 2020, with one Washington Post columnist suggesting "perhaps it is time anyway to stick a fork in the dated ritual."