The superstar singer posted a shot of a few food items she's been feasting on on her Instagram page Thursday, which included vegan Portobello mushroom, roasted corn and vegan mac 'n' cheese.
"#22DaysVegan," she wrote in a caption alongside the photo.
The "Grown Woman" crooner and her rapper beau have been spotted grabbing a couple of vegan meals around Los Angeles this week, heading to Real Food Daily Tuesday and Café Gratitude Wednesday.
According to E! Online, the duo enjoyed a feast when they dined at Real Food Daily, with Beyoncé ordering the Spicy BLT wrap, tempeh bacon, Lentil Walnut Plate, and Jay Z dining on the Mediterranean Bowl.
The whole table, which included Beyoncé's sister Solange, also ordered fresh organic juice, the soup of the day, "Lima Bean & Squash," Sea Cake, Kung Pao, The Great Cardini salad, Supreme Burrito and a Veggie Wrap with mushrooms.
Jay Z announced Tuesday that he was going on a spiritual vegan cleanse with his ladylove for his 44th birthday.
"On December 3rd, one day before my 44th birthday I will embark on a 22 Days challenge to go completely vegan, or as I prefer to call it, plant-based!! This all began a few months back when a good friend and vegan challenged me to embrace a 'plant-based breakfast' every day. It was surprisingly easier on me than I thought," he explains.
"So you can call it a spiritual and physical cleanse," the rapper went on. "B is also joining me."