I went through a phase where I bought tofu every week and threw half of it away. The package would sit in the fridge, I would forget about it, and four days later it smelled like a science experiment. I thought tofu just went bad fast. Turns out I was storing it completely wrong.

The way most of us store tofu — tossing the half-used block back in the fridge in its original container with some tap water — is basically inviting it to spoil. Here is what I learned after one particularly frustrating month of wasted groceries.

Why Tofu Goes Bad So Fast

Tofu sits in water when you buy it, but that water is not regular water. It is packaged in sterile, sealed conditions. Once you open the package, bacteria from the air and your hands get in, and that water becomes a breeding ground.

The other problem: stagnant water turns sour within a day or two. Even in the fridge, the clock starts ticking the moment you break that seal.

The Method That Actually Works

After trying four different approaches — plastic wrap, Tupperware, original container, and a tofu press — here is the system that keeps my tofu fresh for up to a full week:

1. Drain the original water completely. Dump it. That liquid has done its job.
2. Rinse the tofu block under cold running water for about ten seconds. Pat it dry gently with a clean paper towel.
3. Fill a clean container with fresh cold water. I use a glass Pyrex with a lid. The water should fully submerge the tofu.
4. Change the water every day. This is the part I used to skip. It takes twenty seconds. It makes all the difference.
5. Store it at the back of the fridge — not the door. The temperature is more stable back there.

Since switching to this method, I have not thrown out a single block of tofu. My stir-fry game has never been stronger.

A Few Things I Learned the Hard Way

Do not freeze tofu unless you want a totally different texture. Frozen tofu becomes spongy and chewy — great for some dishes, terrible for others. Know what you are making before you freeze.

Smell it before you use it. Fresh tofu has a very mild, slightly sweet scent. If it smells sour or funky — toss it. No recipe is worth food poisoning.

Silken tofu is more delicate. The method above works for firm and extra-firm. Silken tofu has a shorter shelf life no matter what you do — use it within two days of opening.

Honestly, the daily water change felt like a hassle at first. But now it is just part of my morning kitchen routine — make coffee, change the tofu water. Takes less time than waiting for the coffee to brew.