Broccolini is a hybrid vegetable, composed of a cross between broccoli and Chinese kale.It is often mistaken for young broccoli. It typically has a sweeter flavor than broccoli. It is an excellent source of Vitamin C, Vitamin A, calcium, folate, and iron. | Broccolini is a hybrid vegetable, composed of a cross between broccoli and Chinese kale.It is often mistaken for young broccoli. It typically has a sweeter flavor than broccoli. It is an excellent source of Vitamin C, Vitamin A, calcium, folate, and iron. |