Spinach, broccoli, Brussels sprouts, asparagus, and cauliflower consistently rank among the best vegetables for protein with minimal carbs. Edamame stands apart from the pack, delivering 18.4 grams of protein per cup with only about 6 grams of net carbs. While no vegetable rivals meat as a protein source, choosing the right ones lets you add meaningful protein to your plate without blowing past your carb budget.
The Best High-Protein, Low-Carb Vegetables
Not all vegetables contribute much protein, and some that do come loaded with starch. The ones below hit the sweet spot: relatively high protein for a vegetable, with net carbs (total carbs minus fiber) that stay low. Net carbs matter more than total carbs here because fiber doesn’t raise blood sugar or count against most low-carb targets.
Edamame
Edamame is in a league of its own among vegetables. One cup of shelled, cooked edamame delivers about 18.4 grams of protein and roughly 5.8 grams of net carbs (13.8 g total carbs minus 8 g fiber). That protein count rivals what you’d get from two eggs. For comparison, a cup of cooked lentils has 40 grams of carbs, and garbanzo beans hit 45 grams, making edamame by far the most low-carb-friendly legume. It also packs 8 grams of fiber per cup, covering about a third of the daily recommendation. You can eat it steamed as a snack, toss it into stir-fries, or add it to salads for a quick protein bump.
Spinach
Raw spinach has almost no net carbs. A one-cup serving (30 g) contains about 1 gram of protein, 1 gram of total carbs, and 1 gram of fiber, putting its net carbs essentially at zero. That ratio looks small, but spinach shrinks dramatically when cooked. You can easily eat three or four raw cups in a salad or cook down a large handful into a side dish, accumulating several grams of protein with virtually no carb cost. It’s one of the safest vegetables to eat freely on any carb-restricted plan.
Broccoli
One cup of chopped raw broccoli provides 2.6 grams of protein and about 3.7 grams of net carbs (6 g total carbs minus 2.4 g fiber). Broccoli is a staple in low-carb and keto eating for good reason: it’s filling, versatile, and nutrient-dense without adding much to your carb count. Roasting it with olive oil or tossing it into soups are easy ways to work in extra servings.
Brussels Sprouts
A cup of raw Brussels sprouts gives you 3 grams of protein and 4.5 grams of net carbs. They’re slightly higher in carbs than broccoli or cauliflower, but the tradeoff is a meatier texture and more protein per serving. Halved and roasted until crispy, they’re one of the more satisfying vegetable side dishes you can pair with a protein-focused meal.
Cauliflower
One cup of raw cauliflower has about 2 grams of protein and 2.8 grams of net carbs (5.3 g total carbs minus 2.5 g fiber). Cauliflower has become the workhorse of low-carb cooking because it mimics starchier foods surprisingly well. Riced cauliflower stands in for grain-based rice, cauliflower mash replaces potatoes, and cauliflower pizza crust has become a grocery store staple. Each swap keeps protein roughly the same while cutting carbs dramatically compared to the original.
Asparagus
A half-cup of cooked asparagus (90 g) provides 2.2 grams of protein and about 1.9 grams of net carbs (3.7 g total carbs minus 1.8 g fiber). That’s one of the best ratios on this list. Asparagus also delivers a significant dose of vitamin K, with a half-cup covering a large portion of the daily target. It cooks quickly, whether grilled, roasted, or sautéed, and pairs naturally with eggs, fish, or chicken.
Mushrooms
White button mushrooms contain about 3 grams of protein per 100 grams raw. Their carb content is modest, and because mushrooms are mostly water, you can eat a generous portion without much caloric or carb impact. They also bring a savory, umami depth that makes meals feel more satisfying. Sautéed mushrooms work well as a topping for salads or grilled meats, adding both flavor and a bit of extra protein.
How These Compare to Other Protein Sources
Even the best protein vegetables can’t compete with animal proteins or legumes on a gram-for-gram basis. A chicken breast has roughly 31 grams of protein per serving. A cup of edamame, the strongest vegetable option, gets you about 18 grams. Most other vegetables on this list land between 2 and 3 grams per cup. That doesn’t mean they’re not useful. If you’re eating several cups of vegetables across a day’s meals, those small amounts add up to 10 or 15 extra grams of protein, which matters when you’re tracking intake carefully.
The real advantage of these vegetables isn’t replacing a protein source. It’s that they add protein without adding the carbs that come with grains, potatoes, or most beans. A cup of cooked rice has over 40 grams of carbs. A cup of broccoli has under 4 grams of net carbs and still contributes some protein. Over the course of a day, choosing these vegetables as your sides and salad bases creates room in your carb budget for meaningful protein gains elsewhere.
Fitting These Into a Low-Carb Day
Most low-carb diets cap daily carbs somewhere between 20 and 50 grams. Ketogenic diets typically stay below 50 grams, with most of those carbs coming from non-starchy vegetables like leafy greens, broccoli, cauliflower, asparagus, and squash. At those limits, vegetable choice matters. A cup of Brussels sprouts at 4.5 net carbs is fine, but three cups would eat up more than a quarter of a strict keto budget.
A practical approach is to build meals around two tiers. Use leafy greens like spinach and romaine as your base, since they contribute almost zero net carbs and let you eat large volumes freely. Then add a cup or so of a more substantial vegetable like broccoli, cauliflower, or asparagus for texture, protein, and satiety. If you want a real protein boost from vegetables alone, a half-cup of edamame as a snack or salad topper gets you close to 10 grams of protein for under 3 grams of net carbs.
Cooking method matters too. Steaming, roasting, and sautéing in olive oil or butter don’t add carbs. But breading, glazing, or pairing vegetables with sweet sauces can quietly double or triple the carb count of a serving. Keeping preparations simple preserves the low-carb advantage these vegetables naturally offer.
Quick Reference by the Numbers
- Edamame (1 cup shelled, cooked): 18.4 g protein, ~5.8 g net carbs
- Brussels sprouts (1 cup raw): 3 g protein, 4.5 g net carbs
- Broccoli (1 cup chopped, raw): 2.6 g protein, ~3.7 g net carbs
- Cauliflower (1 cup raw): 2 g protein, ~2.8 g net carbs
- Asparagus (1/2 cup cooked): 2.2 g protein, ~1.9 g net carbs
- Spinach (1 cup raw): 1 g protein, ~0 g net carbs
- Mushrooms, white (100 g raw): 3 g protein, low net carbs