Every 100 kcal of portabella mushrooms brings 11.3 g of protein. On that measure it ranks 9th of the 105 vegetables in this database and 222nd of all 796 foods on the site. Measured by weight instead, its 3.28 g per 100 g ranks 12th in its group.
Protein accounts for roughly 45% of the calories in portabella mushrooms, making it very protein-dense. The rest comes from fat and carbohydrate, so it adds a solid amount of protein while still carrying real energy - useful when you are eating to a calorie target rather than under one.
Weight for weight, portabella mushrooms has 5.7 g of protein for each gram of fat (3.28 g against 0.58 g per 100 g).
Set against artichoke, another vegetable entry in the database, a serving carries about 0.5 g more protein (artichoke has 3.5 g per 1 medium).
It is an incomplete protein on its own; pairing it with other plant foods across the day covers the full range of essential amino acids. The serving quoted here is measured by volume at 121 g, and it covers about 8% of the 50 g FDA Daily Value for protein.
Serving sizes
Protein in common portions of portabella mushrooms
Protein and calories in Portabella mushrooms for 100 g, the site serving and USDA household portions.
Portion
Weight
Protein
Calories
100 g
100 g
3.28 g
29 kcal
1 cup grilled slices (serving used here)
121 g
4 g
35 kcal
The USDA record lists no other household measure for this food; protein and calories scale from the per-100 g figures.
Amino acids
Essential amino acids in portabella mushrooms
The nine essential amino acids in Portabella mushrooms, per 100 g, per serving and per gram of protein.
Amino acid
Per 100 g
Per serving
mg per g protein
leucine
0.15 g
0.18 g
46
lysine
0.11 g
0.13 g
34
valine
0.41 g
0.5 g
125
isoleucine
0.09 g
0.11 g
27
threonine
0.125 g
0.15 g
38
phenylalanine
0.1 g
0.12 g
30
methionine
0.035 g
0.04 g
11
histidine
0.065 g
0.08 g
20
tryptophan
0.045 g
0.05 g
14
Per-100 g values are the amino acid analysis on the USDA record. The serving and per-gram-of-protein columns are arithmetic on those values; they are not a protein quality score.
SampleWhat goal trends look like after a week
109 g
Average per logged day
4 of 7
Days goal met
71%
Complete-protein share
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Sample figures for one made-up week against a 110 g goal, not your data. Red bars met the goal. Your own log fills this in with Premium.
How much protein is in 100 g of portabella mushrooms?
3.28 g. The 1 cup grilled slices serving used on this page weighs 121 g and so carries 4 g.
How much protein do you get per 100 calories of portabella mushrooms?
11.3 g. That figure divides its 3.28 g of protein per 100 g by its 29 kcal per 100 g, so it does not depend on serving size.
Is the protein in portabella mushrooms complete?
No. On its own, the protein in portabella mushrooms is short of at least one essential amino acid; other protein sources across the day fill the gap.
What share of the protein Daily Value is one serving of portabella mushrooms?
About 8%. One 1 cup grilled slices serving has 4 g, and the FDA Daily Value for protein is 50 g.
Figures from USDA FoodData Central record #169243 (Mushrooms, portabella, grilled), SR Legacy data. USDA data is in the public domain. Values are the published reference figures for that record, not lab measurements for a specific brand or batch.