Do You Really Need to Use Oil When Roasting Vegetables? (2024)

Christine Gallary

Christine GallaryFood Editor-at-Large

Christine graduated from Le Cordon Bleu in Paris, France, and she has worked at Cook's Illustrated and CHOW.com. She lives in San Francisco and loves teaching cooking classes. Follow her latest culinary escapades on Instagram.

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published Feb 23, 2015

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Do You Really Need to Use Oil When Roasting Vegetables? (1)

Q: Recipes for roasted vegetables always say to coat the vegetables with oil before roasting. I usually skip this step and just put the diced-up veggies on a Silpat sheet.

They always turn out fine and get nicely browned, so I’m just wondering what is the real purpose for tossing everything in oil before roasting?

Skipping the oil at this stage makes cleanup a lot easier, and I just add butter or oil once the vegetable is on my plate.

Sent by Joe

Editor: Coating vegetables in oil does a few things. For one, it helps prevent vegetables from sticking to the baking sheet or roasting pan. (But since you’re using a Silpat, it looks like that isn’t an issue here.)

Roasting vegetables with oil also encourages extra browning and creates a richer, more toasty flavor. Lastly, the oil gets a chance to cook out some of its raw flavor and mingle with the flavor of the vegetables.

If you’re happy with how your roasted vegetables turn out with your method, you should by all means continue with it! It might be a fun comparison, however, to coat half of the vegetables in some oil before roasting to do a side-by-side tasting.

Readers, do you think oil is necessary when roasting vegetables?

Do You Really Need to Use Oil When Roasting Vegetables? (2024)

FAQs

Is oil necessary to roast vegetables? ›

When vegetables are roasted without oil the finished product is a bit drier than it would be otherwise. However, finishing the roasted vegetables and adding flavor post-cooking, such as by tossing them in a small amount of high flavor liquid will boost flavor and add complementary flavor notes to the dish.

Can you cook vegetables without oil? ›

Just know that broth and coconut aminos do add flavor. No Oil: Rely on water or broth to sauté ingredients like diced vegetables, onions, and garlic. You'll need to continue adding a little broth or water at a time to keep the ingredients from sticking to the pan, but it does work (see photo below)!

Should I use oil when cooking vegetables? ›

She spoke with us about the health benefits of extra virgin olive oil, noting - among other things - it's better to cook your vegetables in olive oil versus steaming or boiling them.

What is the healthiest oil to use when roasting vegetables? ›

For high heat cooking, it's important to choose oils that maintain their stability. Oils heated past their smoke point break down, which affects flavor and can produce unhealthy compounds. Some healthier cooking oils that can withstand higher temperatures include olive oil, avocado oil, sesame oil, and safflower oil.

What is a good substitute for oil in a roast? ›

substitute for fats like oil, butter, or shortening. Some of my favorites include applesauce, mashed bananas, and puréed dates. In some instances, nut flour or nut butters can serve as substitutions or additions. Roasting—There's no need to coat your vegetables or other foods with oil before roasting them in the oven.

Can I skip vegetable oil? ›

Vegetable oil can be substituted for another healthy cooking oil like canola, sunflower, peanut or grapeseed oil in a pinch. From frying to baking, these alternatives can be easily swapped in (like many other simple ingredient substitutions).

What is a good substitute for olive oil when roasting vegetables? ›

Instead, reach for a more mild, neutral cooking oil, like vegetable, canola, or grapeseed oil. It will coat foods the same way, helping them cook evenly and come out of the oven with dreamy caramelized edges, without imparting any extra flavor.

What happens if you cook without oil? ›

Meanwhile, oil-free cooking offers many potential health benefits, from lowering calorie intake to strengthening your heart. Additionally, cooking without oil can simply make your dishes taste more authentic, fresh and delicious. Let's look at some considerable health benefits of oil-free cooking below.

What are two tips to remember when roasting vegetables? ›

You want to see a bit of space around the veggies — don't be afraid to split them between two baking sheets if you need to. Crowding will make the vegetables steam instead of roast, and that's the opposite of what we're going for. Also, make sure your oven is good and hot before you put the vegetables in to roast.

Why won't my roast veggies go crispy? ›

The Oven Temp Is Too Low

A low-and-slow cooking technique is excellent for vegetables like carrots, beets or potatoes that you plan to puree into soup. But, they'll turn out soft and soggy instead of crispy and caramelized. The solution: Turn the oven temperature up to 400°F to 425°F.

What is the best temperature to roast vegetables at in the oven? ›

Divide the vegetables evenly between the two sheets, spreading them into a single layer. Roast the vegetables at 400 degrees F for 25 to 35 minutes (or if you have the convection option, do a convection bake at 375 degrees F for 20 to 25 minutes).

Is it necessary to use vegetable oil? ›

Health professionals often recommend vegetable oils for those at risk of heart disease. The reason is that vegetable oils are generally low in saturated fat and high in polyunsaturated fat. The benefits of reduced saturated fat intake are controversial.

What is the best oil for roasting? ›

Best cooking oil for roasting

Extra virgin olive oil and coconut are both good for slow roasts due to their low smoke point and added flavour, whilst vegetable oil and rapeseed oil are neutral, medium smoke point oils that are versatile and can be used in most roasts.

What happens if you use olive oil instead of vegetable oil? ›

If substituting olive oil for vegetable oil (or another cooking oil) in your baking recipe, you can use a 1:1 ratio. Because of olive oil's distinct flavor, it might affect the flavor of the baked product.

Can I roast vegetables with butter instead of oil? ›

Roasting: Start with cold butter and cut it into large cubes and dot your pan of vegetables with the cubes before roasting. For high-heat roasting, make your own ghee or clarified butter. Stir-frying: Butter has a lower smoke point than our favorite oils for stir frying.

Why use oil when roasting? ›

Oil helps to transfer heat to the food evenly and that also helps to prevent the food from sticking to the cooking surface.

What happens if you don't have vegetable oil? ›

If you don't have any vegetable oil on hand, you can substitute another neutral high-heat oil. Canola, safflower, peanut or grapeseed oils are all great choices. Refined versions can reach even higher temperatures than unrefined ones.

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