Why is the bun of Ninja Burger black? What is it made of? October 13, 2022 04:44 The bun contains approved food grade charcoal powder. Related articles What does the Ninja Burger contain? Are the Ninja burgers same as the ones that were launched previously? Is the Seaweed McShaker Fries suitable for vegetarians? What does the Samurai Beef/Chicken Burger contain? What kind of meat do you use in your McChicken® and Chicken McNuggets®?