The 25-year-old also revealed that she fasts for 12-14 hours during the night and drinks two full litres of water in the morning.
For breakfast the model then has a chocolate Vega meal-replacement shake that she eats with a spoon.
Malcolm makes sure she's eating every three to four hours and snacks on nuts, beans and vegetables. She will not eat anything that comes out of a box.
While her diet sounds like it adheres to at least a couple of current food fads, she's not on board with protein.
"I hate our societies (sic) obsession with protein," she wrote.
"With obesity rates skyrocketing, I wonder if people will start to make the connection that getting your protein in is killing them slowly.
"I do make sure that with each meal I am having a serving of tofu or beans. No steaks here, and I am yet to die of a protein deficiency."
For those of you wondering if Malcolm has a vice, she did admit that she gives in to her cravings every now and then.
"If I want some vegan ice cream, or sweet potato fries, I go for it. Life is short," Malcolm wrote.