08/28/2026
This tofu is molten inside.
By
It's called bāojiāng dòufu, and it comes from Yunnan, where the local water gives the tofu its texture naturally. At home, baking soda does the same job.
Tofu is a network of soy proteins holding water in place, and those proteins stick together partly through charge. Raise the pH to around 8 or 9, just above neutral, and they pick up more negative charge, so they repel each other instead of holding tight. The network loosens without falling apart.
After 8 hours in the fridge the block is noticeably softer but still holds its shape, and the surface goes slightly slippery. That's how you know it worked.
Then frying does three things at once. The outside dries into a crisp shell. The water inside turns to steam. And the loosened protein network can't hold against that pressure, so the center flows.
Keep the soak to 8 hours and keep it cold. Longer and it turns soapy.
I coat mine in potato starch, air-fry until crisp, and serve with a spicy umami dipping sauce.
This is just one of 17 techniques from my Tofu Mastery guide.
Comment 'recipe' and I'll send you my lava tofu recipe or go directly to my website, link in bio.