It takes a bit of practice and patience to properly “turn” an artichoke, but the task is well worth the effort. If it’s your first time working with the fresh, thistly vegetable, you may find the heaps of trimmed leaves excessive or wasteful, but rest assured, it’s all par for the course to reach those tender hearts.
Cut artichokes begin to turn brown the moment they’re exposed to air; to prevent that, some cooks hold them in a bowl of lemon water while trimming. That said, if you’re cooking the artichokes (as opposed to, say, slicing them raw for salad), they turn brown when exposed to heat anyway, so it’s fine to skip the acidulated bath.
You may not want your fingers to turn brown, however: Artichokes contain a phytochemical called cynarin that can discolor skin. For that reason, we recommend wearing latex gloves, especially if you’re trimming large quantities of the vegetable.