Oyster mushroom extracts make burger formulation a multi-criteria task

Oyster mushroom extracts may offer an interesting tool for beef-burger development, but the new data are primarily a technological starting point. A Meat Science paper examined how cap and stipe extracts from Pleurotus ostreatus changed volatile compounds and the availability of free amino acids in cooked beef burgers, including after simulated gastrointestinal digestion.

Four formulations were compared: a control, a version with 0.01% sodium erythorbate, and two versions containing 0.5% cap or stipe extract. Treatment significantly influenced both the volatile profile and amino-acid profiles. The cap extract increased the fraction of umami-associated amino acids—aspartate plus glutamate—in cooked burgers from 9.7 to 18.1 mg per 100 g.

Burgers containing the extracts also showed higher concentrations of several essential and umami-related amino acids after simulated digestion. At the same time, several oxidation-associated volatiles, including hexanal, 1-octanol and 2-pentylfuran, were reduced. Digestion stage explained most of the overall variation in amino-acid profiles; the stage-by-treatment interaction was not significant in the global analysis.