Cooking methods affect how much nutrients vegetables retain. Steaming is one technique that can help limit nutrient loss. Because the vegetables cook in rising steam without touching the boiling water, they may retain more of their color and natural flavor. Steaming time varies by vegetable. Shorter cooking keeps vegetables firmer and brighter, while overcooking can affect their texture and flavor. The approximate times below are for commonly used vegetables; size and cut can change the results.
Root and tuber vegetables
• Steam unpeeled beets for 15–20 minutes.
• Steam potatoes for 20–30 minutes, depending on size. Cooking both vegetables in their skins can help preserve their flavor and color.
• Steam medium-sized carrot slices for 6–10 minutes, until they reach the desired firmness.
• Thicker root-vegetable pieces take longer; thinner slices cook faster but may fall apart. Cut pieces to a similar, medium thickness.
• Unpeeled artichokes are among the vegetables that take longest to steam; cook them for 25–35 minutes.
Leafy greens and flowering vegetables
Broccoli takes 4–7 minutes; medium-density vegetables such as cabbage and carrots take 6–10 minutes; and spinach takes only 3–5 minutes. Avoid going over these times if you want to preserve the vegetables’ color and texture. Asparagus can be steamed for 5–10 minutes, depending on the thickness of the stalks. Steam leeks for 5–8 minutes, until tender but still holding their shape.
Onions and legumes
Steam sliced onions for 15–20 minutes and sliced peppers for 6–8 minutes. Shelled peas take 10–15 minutes to soften. When steaming a mix of vegetables, use the cooking time of the vegetable that takes longest. If the vegetables need different amounts of time, start the longer-cooking ones first and add the quicker-cooking ones later so they can finish at the same time.
How do you steam vegetables correctly?
Keep the water below the vegetables so that only steam cooks them; direct contact with water may affect their flavor and texture. Close the lid tightly to keep the steam in, shorten the cooking time, and save energy. Add a few lemon slices or fresh herb sprigs to the water to give the steam a light aroma. At the end of cooking, the vegetables should be easy to pierce with a fork but not falling apart.
What are common steaming mistakes?
The most common mistake is cooking vegetables with different cooking times together for the same length of time. Some may become too soft while others remain firm. Opening the lid too often lets steam escape and can lengthen cooking. Cutting vegetables too thick or too thin also makes the listed times less reliable; the times work best for similarly sized pieces. Remove vegetables from the steamer when done to prevent carryover cooking and texture loss.