Kim Kardashian hasn't been grocery shopping in more than a decade

Speaking to her sister Khloe on her Khloe In Wonderland podcast, she said: "I feel like we went to Erewhon on our show like six years ago but before that maybe 12 years ... It's probably been like 15 years."

The mother-of-four -who has North, 12, Saint, 10, Chicago, eight, and six-year-old Psalm with ex-husband Kanye West - has pleaded with Ralph's to let her have free reign of their store.

She said: "I've been begging Ralph's."

Despite not stepping foot in a food store, Kim does go to the shopping mall with her eldest child.

She said: "I go to the mall all the time, with North."

Kim and Khloe, 41, insist they are "not incompetent human beings" and do mundane things like housework.

During the podcast, the TV star also revealed she's been encouraging North to follow her interests with "realistic courses" such as a brand-building class.

Kim explained: "She had an idea of making hats and making jewellery ... so we made it a course. It's been so fun to see her blossom."

North is also taking a course in music, which has helped her "bond" with her father.

Kim said: "The music side and the producing isn't my thing, and that's her bonding with her dad... But we have to communicate about how North moves through this world.

"Respecting [Kanye's] opinion on the things that go on with his kids is really important."

The All's Fair star also dismissed the idea that she views her eldest daughter as her "bestie".

She said: "I think like the one misconception that people might have is like, 'Oh, she's trying to be her bestie and lets her get away with a lot.' Like, no, Northy actually has a lot of rules ...

""[Her appearance is] one area I do let her express herself. I love her for that, and she would do it, you know, regardless...

"It's funny, like people are like, 'Oh, this blue hair, all of this, all of a sudden,' or like her fake piercings that she puts up.

"I have pictures of her when we're in first grade [and] pre-K, where she'd come with like a fake septum ring and she has her green braids and she has pink braids. But she's always loved the coloured braids in her hair since she was little."