One of the things you need to do is get ice in Soulmask if you want to preserve your food. It is an item that you can use as fuel, which helps to prevent your food from rotting. It can be used for your Ice Cellar, which in this game acts as a refrigerator. Using it will greatly slow down the spoilage of the food you have worked hard to make. So here is where you can find ice, and the resources you need to build an Ice Cellar.

You can find ice in the Snowy Mountain regions of the game. Go to the lakes and look for small blue pieces that float, this is the ice you are looking for. Thanks to the game Wiki for this information.

As explained above, Ice Cellar uses ice to lower the temperature of the food you store in it to slow down its spoilage. You must have Awareness Strength level 40 to unlock it. Once you have unlocked it, you can craft it in a Building Workshop. The materials you will need to make it are as follows:

Once it's done, you can save the food you don't want to eat right away and cook it later.