The secret to making plant-based meat taste “meatier”? Fermented onions, say scientists

- Plant-based meat often looks real, but doesn’t have that real meaty taste
- Scientists claim that adding fermented onions can produce this sought-after aroma
From beetroot burgers to vegan ribs, imitation meat is becoming increasingly popular.
These plant-based alternatives often look real, but most still lack the real meaty flavor after cooking.
Now scientists at the University of Hohenheim believe they have the solution – even if it doesn’t sound particularly tempting.
They claim that adding fermented onions, chives or leeks to plant-based meat can produce the sought-after flavor.
“These onion ferments could one day be used as a natural flavoring in various plant-based meat alternatives,” the researchers said.

From beetroot burgers to vegan ribs, imitation meat is becoming increasingly popular. These plant-based alternatives often look real, but most still lack the real meaty taste after cooking (stock image)
Many plant-based meat manufacturers use synthetic additives to replicate the taste and aroma of the meat.
However, Because these flavors are produced through synthetic processes, many countries do not allow food manufacturers to label them as “natural.”
“To access a plant-based, ‘natural’ meat flavor, the flavor chemicals would need to be physically extracted from plants or biochemically created using enzymes, bacteria or fungi,” the team explained.
In their new study, published in the Journal of Agricultural and Food Chemistry, researchers wanted to create a meaty taste using natural ingredients and processes.
The team tested a range of foods including chives, ginger, leeks, ramons, red peppers and yellow onions.
These were fermented with different types of mushrooms before the flavors were tested using chromatography-mass spectrometry.
The results showed that only foods from the Allium family – chives, leeks and yellow onions – produced meaty flavors.

It was found that the most fragrant sample came from an 18-hour fermentation of onions with the fungus Polyporus umbellatus
In particular, it was found that the most fragrant sample came from an 18-hour fermentation of onions with the fungus Polyporus umbellatus.
‘[This] “produced a fatty and meaty smell reminiscent of liver sausage,” the researchers said.
Upon closer inspection, the team found that the fermented onion had many of the same odor chemicals found in real meat.
For example, one chemical identified was bis(2-methyl-3-furyl) disulfide, a potent chemical found in meaty and savory foods.
The study will come shortly afterwards Experts at the University of Oxford have found that eating just 100g of meat per day – less than a single burger – produces four times more greenhouse gases compared to a vegan diet.
The researchers now want quick political action from the government and organizations to bring about a “dietary shift away from animal foods”.
Previous studies have suggested that avoiding a meat diet has health benefits, including a lower risk of heart disease.