Keto vegetables – the best and the worst

What vegetables can you have on a keto diet? There’s a simple rule:

• Above-ground vegetables are generally lower in carbs and are usually the best keto options.
• Below-ground vegetables — also known as root vegetables — contain more carbs and aren’t a great choice, especially potatoes and sweet potatoes.

Read on for more details, and when there are exceptions to this rule.

Above ground

Carb counts are provided as net carbs per 100-gram (3½-ounce) serving.¹² The options to the left are solid keto vegetables.The options at the top are solid keto vegetables.

Note that while the below-ground vegetables range from 7 to 17 grams of carbs per 100 grams, the above-ground vegetables are all under 5 grams of carbs per 100 gram serving. Quite a difference!

A word about onions: while they grow below ground and are higher carb, they can be added to foods as a seasoning because you generally won’t eat too many at once.

Be careful of caramelized or sautéed onions, as these are easier to consume in larger amounts. Green onions, or scallions, can be used to top salads or other dishes in modest amounts.

Vegetables on keto

All foods are made up of macronutrients – carbs, protein, and fat. While meat and most dairy mainly provide protein or fat, vegetables contain mostly carbs.

On a strict ketogenic diet, with fewer than 5% of calories from carbs, it’s important to know which veggies are the lowest in carbs, particularly if your goal is to consume fewer than 20 grams of carbs per day.

Vegetables with less than 5 grams of net carbs may be eaten relatively freely. It’s hard to overeat spinach, zucchini, lettuce, cucumbers, cabbage, asparagus and kale on a keto diet. These are considered keto vegetables.

Be more careful with slightly higher-carb vegetables like bell peppers (especially red and yellow ones), brussels sprouts and green beans to stay under 20 grams of carbs a day. The carbs can add up. For instance, a medium-size pepper has 4-7 grams of carbs.

While tomatoes are technically a fruit, they can work on a keto diet. But again, their carbs are a bit higher. When combined with other foods, you may exceed 20 grams of net carbs a day if you consume too many tomatoes.

If you are doing a more moderate or liberal low-carb diet that allows more than 20 grams of carbs a day, you can eat as many above-ground vegetables as you desire.

Other helpful guidelines

Here are two more general rules that can help you choose lower-carb and keto vegetables:

• In general, keto-friendly veggies are those with leaves — all types of lettuce, spinach and other greens are good ketogenic options.
• Green vegetables tend to be lower in carbs than veggies with a lot of color. For example, green cabbage is lower in carbs than purple cabbage. Green bell peppers are also somewhat lower in carbs than red or yellow peppers.

Vegetables and fat

You can use keto vegetables as a vehicle for fat by seasoning cooked vegetables with butter. Better yet, sauté or roast them in lard, coconut oil, avocado oil, or ghee.³ If you eat dairy, you can make a cream sauce with heavy cream, cheese, and/or cream cheese.

Another excellent way to add fat to vegetables is by dipping them in salad dressings or other dipping sauces, or simply adding olive oil to your salad.

If you want to lose weight, try not to go overboard with fat. For best results, you may want to let your body burn excess body fat instead of extra added dietary fat. In this case, just eat enough fat to prevent hunger.

Learn more in our guides on how much fat you should eat, and our take on the best and worst fats and sauces

1. Cauliflower – 3 g. Mild flavor and so versatile. Use it as base of staples like cauliflower rice and cauliflower mash. Have a look at our top 18 cauliflower recipes
2. Cabbage – 3 g. Delicious when sautéed in butter or used in our popular Asian cabbage stir fry. See more of our top cabbage recipes
3. Avocado – 2 g. Technically a fruit, but loaded with nutrients and healthy fat. ⁶ Great sliced, mashed as guacamole, or even baked. Here are some great avocado recipes
4. Broccoli – 4 g. Swap it for pasta, rice or potatoes. It can be steamed, fried in butter, drizzled in cheese sauce, roasted with bacon, baked au gratin and more. Check out these recipes
5. Zucchini – 3 g. Miss potatoes? Try our zucchini fries or zucchini chips. Zucchini can also be spiralized to make keto pasta, like in this keto carbonara. More recipes
6. Spinach – 1 g. Extremely low in carbs, it can be used raw in salads, baked into chips, sautéed, or creamed. Check out our popular keto frittata with fresh spinach or many other spinach recipes
7. Asparagus – 2 g. Filling, highly nutritious, and very low carb, asparagus was made for a high-fat sauce such as hollandaise or béarnaise. Top recipes
8. Kale – 3 g. Although slightly higher carb than spinach, kale is a flavorful veggie. Enjoy it raw in salads, bake into chips, sauté in lard, or use as a base instead of pasta. Recipes
9. Green beans – 4 g. Green beans can be roasted, steamed, or stewed, but may taste even better cooked in bacon fat or butter. Recipes
10. Brussels sprouts – 5 g. Baby cabbages are excellent roasted until crispy or served in a creamy sauce. Recipes

Keto crudités

Shopping lists & meal plans

The meal plan below is available through Diet Doctor Plus. Not a member? Sign up for a FREE 30-day trial and get full access to our 90+ keto meal plans and other membership benefits./

More

A ketogenic diet for beginners 

Ketogenic diet foods – what to eat and what to avoid 

14-day keto diet meal plan with recipes and shopping lists 

How to follow a healthy vegetarian keto diet