Can You Eat Cauliflower Leaves and the Core?

Cauliflower is often sold at the market with the green leaves around it. These are thick, veined leaves that wrap around and protect the head; the outermost ones are tough, while those farther inside are thinner and paler. The white core where the florets attach is the vegetable’s stem: firm, juicy, and mildly sweet. These two parts are often discarded after the florets are separated, even though both can serve the same purpose in cooking as the florets and can go into a pan or pot on the same day.

First, trim the leaves. Remove yellowed, darkened, or dried tips, and cut the thick central rib away from the leaf with a knife; the rib can be chopped finely and cooked separately. If the thick rib is not separated from the leaf, the leaf cooks through while the rib stays raw. The tender part of the leaf behaves like cabbage: chop it and sauté it with onion, add it to soup or a lentil and vegetable stew. If you put the tender inner leaves on a baking sheet with olive oil, their edges turn crisp. The leaves wilt quickly, so add them to the pot after the florets; leaves added first will fall apart before the florets finish cooking.

The core is firmer than the florets but does not develop a thick skin like a broccoli stem. It usually does not need to be peeled; just remove the lowest cut, dried surface with a thin slice. If the core is thinly sliced and placed on the same baking sheet as the florets, it roasts along with them and its edges caramelize. Cut it into cubes for soup or a vegetable stew, or grate it raw into a salad. A thick piece of core takes longer to soften than a floret; cut it thin and spread it among the florets on the baking sheet so they cook in the same time.

Cauliflower belongs to a family of sulfur-containing vegetables. Heat breaks these compounds down, and the longer they cook, the stronger the sharp odor that spreads through the kitchen. The leaves and core are no exception; if boiled for a long time, they smell pungent and turn bitter. So cook both quickly over high heat: pan-sautéing and roasting in the oven are the best methods. If you boil them, keep the cooking time short and discard the cooking water, because it carries the strongest odor and will transfer it to the dish.

Using the leaves and core also changes what to look for when buying cauliflower. A cauliflower with firm, green, glossy leaves has been freshly picked; yellowed, wilted leaves show that the vegetable has been stored for a long time, and these leaves would not be used anyway. The cut surface of the core should be white and moist; a browned or hollowed-out core is a sign that the cauliflower has been sitting for a while. Cauliflower with brown spots on the florets also smells sharper when cooked, and its leaves and core are just as tired.