What's added to the red tofu?

Red fermented bean curd is red because of the addition of monascus rice.

Monascus rice, or simply Monascus, is a kind of fermented rice inoculated with Monascus, which is purplish red or brownish red and used for fermentation, antisepsis, edible coloring and other functions. It is a natural food additive.

Also known as _ _, Fu _, Monascus, and Redmi and China have a long history and tradition of making Monascus rice.

Monascus rice can be used to make red koji wine and red grain.