What Are The Highest Protein Vegetables? | Top Picks & Guide

Edamame, or green soybeans, leads the pack with about 18 to 22 grams of protein per cooked cup, making it a standout among all vegetables.

You might picture a slab of chicken or a scoop of whey powder when you think about getting enough protein. But the produce aisle holds some surprisingly solid options that can help you hit your daily protein target without touching an animal product.

The honest answer to which vegetables deliver the most protein involves a clear winner and a few close contenders. Edamame takes the top spot, but green peas, spinach, and several other greens offer respectable amounts when you know what you’re looking for. This article breaks down the numbers, explains why edamame is special, and shows how these vegetables fit into a balanced diet.

Edamame: The Clear Protein Champion

Edamame, which are immature soybeans still in the pod, provides more protein per cup than any other vegetable. Cooked edamame delivers roughly 18.5 to 22.3 grams of protein per cup, depending on how it’s prepared. That’s nearly as much protein as a three-ounce serving of chicken breast.

What sets edamame apart from other beans and legumes is that it’s a complete protein. This means it contains all nine essential amino acids your body needs but cannot produce on its own. Most other plant proteins are missing at least one essential amino acid, making edamame a uniquely valuable option for vegetarian and vegan diets.

How Edamame Stacks Up Against Other Vegetables

While edamame is the standout, several other vegetables offer meaningful protein content. A cup of cooked green peas contains about 8 grams of protein, and a cup of cooked spinach provides roughly 5.3 grams. Broccoli, Brussels sprouts, asparagus, and artichokes also contribute notable amounts.

Why People Overlook Vegetables For Protein

The common belief is that vegetables are mostly water and fiber with negligible protein. That’s true for watery options like cucumbers and lettuce, but it misses the dense protein in legumes, peas, and leafy greens. The confusion often comes from thinking all “vegetables” are nutritionally similar.

Many people also assume they need meat or dairy at every meal to meet their protein needs. In reality, a well-structured plant-based diet that includes high-protein vegetables and legumes can easily meet protein requirements. Research from PMC supports that traditional legumes, nuts, and seeds are sufficient for full protein adequacy in vegetarian diets.

Here are the top vegetables by protein content per cooked cup, and what makes each one worth including:

• Edamame (soybeans): 18.5–22.3 grams per cup. Complete protein with all nine essential amino acids. Also rich in fiber, iron, and calcium.
• Green peas: About 8 grams per cup. Good source of lysine, an amino acid often limited in grains. High in fiber and vitamins A, C, and K.
• Spinach: Roughly 5.3 grams per cup (cooked). One of the most protein-dense leafy greens. Also supplies iron, magnesium, and folate.
• Broccoli: Approximately 4.5 grams per cup (cooked). Contains glucosinolates, which may have anticancer properties. Good vitamin C source.
• Brussels sprouts: Around 4 grams per cup (cooked). High in fiber and vitamin K. Roasting brings out sweetness.

These numbers are for cooked vegetables unless noted. The protein content of raw vegetables is lower by weight because cooking removes water and concentrates nutrients.

How Legumes Compare And Fit Into A Meal

Legumes — including beans, lentils, and chickpeas — are technically considered vegetables from a culinary standpoint. They rank among the highest-protein plant foods available, often surpassing most leafy greens and cruciferous vegetables. The combination of high protein content, a balanced amino acid profile, and low cost makes legumes an excellent source of protein, as Healthline’s high protein vegetables list highlights.

Legumes also provide digestible carbohydrates and some contain fat. They are rich in lysine, leucine, and arginine, though they are often low in sulfur-containing amino acids like methionine. This means pairing legumes with grains, which are rich in methionine, creates a complete amino acid profile without needing animal protein.

This table shows that aside from edamame, most high-protein vegetables are not complete proteins by themselves. However, eating a variety throughout the day easily fills any gaps.

Practical Ways To Add High-Protein Vegetables To Your Diet

Getting more protein from vegetables doesn’t require complicated recipes. A few simple swaps and additions can raise the protein content of your meals without extra effort.

1. Add edamame to salads and grain bowls: Toss a half-cup of shelled edamame onto a salad or into a quinoa bowl. It adds texture, color, and around 9–11 grams of protein.
2. Use green peas in pasta or risotto: Stir frozen peas into pasta dishes, risotto, or curry during the last few minutes of cooking. They provide 4 grams of protein per half-cup and a mild sweetness.
3. Blend spinach into smoothies: A cup of raw spinach disappears into a fruit smoothie and adds about 1 gram of protein plus a significant amount of iron. Cooked spinach is more concentrated.
4. Snack on roasted chickpeas: Chickpeas are legumes and offer about 7 grams of protein per half-cup. Season with smoked paprika or cumin and roast until crunchy.

The key is not expecting vegetables alone to match animal-protein levels in a single meal. Instead, pair them with grains, nuts, or seeds to build a complete amino acid profile across your day.

What The Research Says About Plant Protein Adequacy

Some people worry that vegetable-based proteins are inferior to animal proteins. Research suggests otherwise for most healthy adults. Essential amino acids are present in many legumes, as confirmed by a Frontiers in Nutrition study, though sulfur-containing amino acids are an exception in chickpeas. The NIH/PMC review on legumes protein source notes that legumes offer high protein content with a balanced amino acid profile at a low cost.

Another peer-reviewed review from PMC found that a well-structured vegetarian diet that includes traditional legumes, nuts, and seeds can achieve full protein adequacy. The key is variety — eating different plant proteins throughout the day rather than relying on a single source. This approach ensures you get all nine essential amino acids without needing animal products.

Legumes and vegetables contribute significantly to dietary protein intake, especially when combined with grains, nuts, or seeds. The data supports that a well-planned plant-based diet is not lacking in protein.

The Bottom Line

Edamame is the highest-protein vegetable by a wide margin, offering about 18–22 grams per cooked cup with all nine essential amino acids. Green peas, spinach, broccoli, and Brussels sprouts are solid contributors, and legumes as a group are a reliable, low-cost protein source. For most people, a varied diet that includes these vegetables along with grains and nuts provides adequate protein without needing animal products.

If you’re tracking protein for muscle gain or specific health goals, a registered dietitian can help you plan meals that include these vegetables while meeting your personal amino acid targets and calorie needs.