The entire vegetable is consumable, including the occasional yellow flower. Common cooking methods include sauteeing, steaming, boiling, and stir frying. Broccolini's flavor is sweet, with notes of both broccoli and asparagus (although it is not closely related to the latter vegetable).
Nutritionally, broccolini is high in vitamin C but also contains vitamin A, calcium, folate, and iron.
In Brazil, the common form of broccoli ("brócolis") actually refers to broccolini, whereas more expensive traditional broccoli is called "brócolis americano" (American broccoli). It looks and tastes a mixture of broccoli and Asparagus.