Malik says the two met at a Victoria's Secret party last year, where he recognized Hadid "from her picture" and asked her out, right then and there. The two then had a "really nice" first date at the Bowery Hotel's restaurant, Gemma, in New York.
"She's a very intelligent woman. She knows how to carry herself. She's quite classy and that. She's not, like, arrogant in any way, she's confident. She carries it well. She's cool," he tells the magazine, before boasting about Hadid's singing voice. "She's got a nice voice, I like her voice."
Almost a year into their relationship, the couple has met each other's families -- the "Like I Would" singer describes Hadid's family as "cool," but notes that her mother, Yolanda, has Lyme disease and isn't well.
According to Malik, the two spend as much time together as they can, either at his home in Los Angeles, or her New York City apartment. "We haven't officially swapped keys or anything yet," he explains, "[but] we live together wherever we are."
These days, the couple stays in, where Malik is happy to cook "steak and potato pie, Sunday roast dinner and Yorkshire pudding," for the 21-year-old model. "Yeah, she likes a good Yorkshire pudding," he adds of the British delicacy. To drink, he'll have whiskey, "Jameson or Glenfiddich," and she'll have "spicy margaritas with jalapeños -- crazy."
Malik, who has moved on from his One Direction days with a supermodel girlfriend and a solo career, also dishes on his departure from the boy band.
"It was just a continuous struggle because I was hurried into a situation that I didn't necessarily want to be in," he says, adding that the band was so heavily managed that he didn't even write his own exit announcement. "Obviously I had to stop feeling like that. So one day I stopped being in the band."
"If I could go back, I'd have a few more years of anonymity," he admits. "Just so I had that time to just get my head around being a famous person."
The former X Factor star talks more about his time in One Direction in his new autobiography, Zayn, revealing that he suffered from an eating disorder before leaving the band in 2015.
"Something I've never talked about in public before, but which I have come to terms with since leaving the band, is that I was suffering from an eating disorder," he writes. "It wasn't as though I had any concerns about my weight or anything like that. I'd just go for days -- sometimes two or three days straight -- without eating anything at all."
"It got quite serious," he confesses, noting that at the time he "didn't recognize it for what it was."