The pickling method of black stinky tofu is as follows:

1. Preparation of ingredients

Put food coloring (appropriate amount) into an empty bucket to become dyeing ingredients bucket.

2. Mixing

Boil a pot of water (about four kilograms). After the water boils, pour it into the ingredient bucket and stir well with a wooden stick.

3. Filter residue

Cool to natural temperature and filter through a fine sieve into another bucket or basin. The filtered residue is discarded.

4. Dyeing

After filtering the residue, put the small pieces of tofu into the dyeing solution one by one, and let them soak naturally for 30 minutes to 2 hours (depending on the temperature). Then pour away the dyeing liquid, and the surface color of the tofu base gradually turns to black or gray-black. At this time, stack the tofu cubes piece by piece and place them in the empty bucket, layer by layer.