Introduction to Fermentation with Koji Mold

At the workshop, we will step into the world of Japanese fermentation and learn about koji — a traditional culture that has played a key role for centuries in the production of foods such as miso, soy sauce, amazake, and sake. We will explore how microorganisms can transform simple ingredients like rice, grains, and legumes into rich flavours, aromas, and textures.

A special feature of koji culture is that it enables the creation of different foods through a similar process — from the sweet amazake to the deep umami flavour of miso.

During the workshop, we will:

• learn about koji mold and its role in fermentation;
• explore basic raw materials (rice, grains, legumes) and their preparation;
• understand the fermentation process and key conditions (time, temperature, hygiene);
• prepare our own miso;
• prepare amazake and discover its natural sweetness without added sugar;
• learn the differences between various fermented products and their use in nutrition.

We will gain insight into the basic principles of koji fermentation and understand how fermentation affects the flavour and nutritional value of food. The knowledge can also be applied at home.

The workshop will offer a broader understanding of fermentation — not just individual recipes, but a way of thinking that opens the door to creating your own fermented foods.

About the mentor

The workshop will be led by Matija Ranzinger, who is developing fermented plant-based spreads from whole ingredients with improved nutritional value within the Metsni Incubator programme in Mladi Rog.

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Participants should arrive 15 minutes before the start of the programme in the entrance lobby of Center Rog. Please store your personal belongings in the lockers, which will be shown to you by the mentor. Please do not be late, as this disrupts the working process. In case of late arrival, we unfortunately cannot guarantee entry into the lab.

The programme is held in Slovenian unless stated otherwise.

The programme is intended for participants aged 14 and above unless stated otherwise.

In case of cancellation, we will notify you two days before the scheduled start.

If you are unable to attend, participation fees are non-refundable and the date cannot be changed. You may transfer your participation to another person by informing us at least 24 hours before the start at kuhanje@center-rog.si.

We look forward to your company and creating together!