Shio-koji (Salt Koji) – Powerhouse Seasoning
Words like elevate and transform are constantly used in cookbooks and cooking programmes but I feel like in the case of shio-koji, their use is not only justified but mandatory. It is a koji larder essential with three ingredients that couldn’t be easier to make.
The word for salt in Japanese is shio [å¡©], so shio-koji is essentially salt koji. While some call it a koji marinade or a koji cure, it is best to use whatever term comes most naturally to you.
Shio-koji is made by mixing rice koji, salt, and water, then leaving it to mature slowly at room temperature for about one to two weeks. This process allows the sweetness, umami, and enzymes within the rice koji to be released, resulting in a rich and flavourful seasoning.
Beyond the Recipe: The Potential of Shio-koji
Making your first batch of shio-koji is just the start of your koji journey. To explore how this mighty seasoning can support your culinary life in multiple ways, check out our companion piece:
The Potential of Shio-koji →
The Power of Enzymes
While it is a healthier alternative to salt, saying it is just a substitute sells its potential short. When rice koji is used to make shio-koji, some 100 or so enzymes produced during the growing process meld into the water and salt mix. Two in particular are the heavy lifters of your larder:
Protease: This enzyme breaks down proteins to produce amino acids, the building blocks of umami.
Amylase: This enzyme breaks down starch to produce glucose, oligosaccharides etc, contributing a deep, natural sweetness.
Finding Your Level
Having a stock of shio-koji is absolutely essential to making the majority of recipes in this collection. You can access it in three ways depending on your ambition:
Beginner: Buy ready-made shio-koji from a Japanese or Asian grocery retailer.
Intermediate: Buy ready-made koji rice and combine it with salt and water yourself.
Advanced: Make your own rice koji from scratch at home. There is no shame in starting at the beginning; once you see the results, we’re confident you’ll be inspired to move up the levels.
Shio-koji
Ingredients
- 200 g rice koji
- 60 g salt
- 240 ml water
Instructions
- Break Up the Koji: Place your rice koji into a clean bowl or directly into your storage container. Using your hands, gently rub the koji together to break up any large clumps. You want every single grain to be free and separated so it can absorb the water evenly.
- Combine and Mix: Add the salt and water to the container with the separated koji. Stir everything thoroughly using a clean spoon or silicone spatula. Ensure the salt is fully distributed and the koji grains are completely submerged in the liquid.