Nutrient Focus
Plant Protein Combinations That Add Up: A Practical Guide
Five plate ideas with protein per portion taken from USDA FoodData Central, and a way to see where a day's protein comes from.
Most questions about plant protein reduce to two things: how many grams a portion holds, and how often that portion shows up in a day. The combining rules that once dominated the topic matter far less than either. We covered the history of that idea in the protein combining piece, and the scoring side in the PDCAAS and DIAAS summary. This guide is the practical end: numbers you can plan around.
Where the numbers come from
Every figure below is protein per 100 g from a USDA FoodData Central SR Legacy entry, then scaled to a portion weight that we chose. The portion weights are examples, not recommendations. The entries are generic, so a branded product with a different recipe will differ, and the label on the pack should win over any table.
| Food (FoodData Central entry) | Protein per 100 g | Example portion | Protein in portion |
|---|---|---|---|
| Lentils, mature seeds, cooked, boiled, without salt | 9.02 g | 150 g | 13.5 g |
| Black beans, mature seeds, cooked, boiled, without salt | 8.86 g | 150 g | 13.3 g |
| Tofu, raw, firm, prepared with calcium sulfate | 17.3 g | 150 g | 25.9 g |
| Tempeh | 20.3 g | 100 g | 20.3 g |
| Edamame, frozen, prepared | 11.9 g | 100 g | 11.9 g |
| Quinoa, cooked | 4.4 g | 150 g | 6.6 g |
| Rice, brown, medium-grain, cooked | 2.32 g | 150 g | 3.5 g |
| Cereals, oats, regular and quick, cooked with water | 2.54 g | 240 g | 6.1 g |
| Peanut butter, smooth style, without salt | 22.2 g | 32 g | 7.1 g |
Two cautions on reading the table. Cooked legumes and grains are mostly water, which is why lentils sit at 9 g per 100 g while dry lentils are far higher; always match the weight you measure to the state the entry describes. And tofu varies a lot with the coagulant and the water content, so the firm, calcium sulfate entry is not a stand-in for every block on the shelf.
Five plates that add up
The protein totals are the sum of the portions in the table above.
1. Lentils and brown rice: about 17 g. 150 g of cooked lentils with 150 g of cooked brown rice (13.5 g plus 3.5 g). Add a spoonful of yogurt-style or tahini dressing if you like; those are not counted here. Legumes and a grain is the classic pairing, and it works because it is filling and cheap, not because of meal-level amino acid arithmetic.
2. Black beans and quinoa: about 20 g. 150 g of each (13.3 g plus 6.6 g). Quinoa contributes less protein per gram than most people assume, at 4.4 g per 100 g cooked, so here the beans are doing most of the work.
3. Tempeh and brown rice: about 24 g. 100 g of tempeh with 150 g of rice (20.3 g plus 3.5 g). Tempeh is among the densest sources on the list, which makes it useful when a plate needs to be compact.
4. Tofu and edamame: about 38 g. 150 g of firm tofu with 100 g of edamame (25.9 g plus 11.9 g). Add 150 g of rice and it reaches about 41 g. This is the largest plate here and comes almost entirely from soy.
5. Oats with peanut butter: about 13 g. 240 g of cooked oats and 32 g of peanut butter (6.1 g plus 7.1 g). Breakfast is where plant protein most often falls short, and a spoon of nut or seed butter is the smallest change that moves it.
Three ways to make the numbers useful
Anchor each meal with one dense food. Tofu, tempeh, edamame, or a legume portion gets a plate most of the way there. Grains and vegetables then fill in the rest and the total is rarely the problem.
Repeat what works. Plant-based eaters who cook from a small rotation tend to know their own totals after a couple of weeks. You do not need a new formula every day.
Look at the day, not the plate. The body draws on an amino acid pool that spans hours, so a low-protein lunch is not cancelled by a strong dinner and vice versa. A quick tally of the day’s plates, done a few times with a food scale, shows you where your usual gaps are.
What this guide does not do
It does not tell you how much protein you need. Requirements depend on age, body size, activity, pregnancy, and health conditions, and the figures in circulation vary by source. For a personal target, particularly if you are training hard, managing a condition, or feeding a child, speak to a registered dietitian or your doctor. Nobody on our editorial team is one.
It also does not cover other nutrients that need attention on a plant-based diet, such as vitamin B12 and zinc. Protein is usually the easier one, and the plates above are a starting point for building a week around it.
FAQ
Do I have to eat beans and rice together? No. A varied day covers it, and the two do not need to share a plate.
Which plant foods have the most protein per 100 g? Of the entries in this guide, peanut butter (22.2 g), tempeh (20.3 g), and firm tofu (17.3 g) are highest. Peanut butter is eaten in much smaller amounts, so per portion tempeh and tofu lead.
Is quinoa a high-protein food? Cooked, it has 4.4 g per 100 g. It contains all the indispensable amino acids and is a fine grain, but as a protein source it sits closer to oats than to lentils.
Why do the numbers here differ from the pack? These are generic USDA entries. Brands, water content, and preparation change the result, so use the label when you have one.
Topics: plant protein combinations · vegan protein per serving · high protein vegan meals · how much protein in lentils · tofu tempeh protein per 100g · plant-based meal ideas protein