The explanation of why stinky tofu is so smelly is as follows

“Stinky tofu smells bad” because during the process of fermentation, pickling and post-fermentation, the protein contained in the tofu is protease-containing. It decomposes under the action of protein, and the sulfur amino acids contained are also fully hydrolyzed, producing a compound called hydrogen sulfide (H2S), which has a pungent odor. After the protein is decomposed, amino acids are produced, and the amino acids have a delicious taste. Taste, so "eat delicious", the production process of yellow stinky tofu is basically the same as the production method of black stinky tofu, but different sellers have their own secrets of preparing brine, so what we taste is different. The stinky tofu sold by merchants has a different taste.