Website review
This review may include AI-generated content and is not individually verified. Domain, certificate and other facts come from the observed data on this page.
What is Fermenthings?
Fermenthings is a fermentation-focused learning project built around an open-source wiki. Its stated aim is to be "a place to learn everything about fermentation," and its content mixes recipes, techniques and food-culture writing rather than acting as a shop or a formal academic course.
H3 What you'll find there
The page evidence shows a practical, recipe-led mix:
- Miso Cookies — using miso as a general ingredient, not just in savoury dishes.
- Three Ways to Bottle a Summer — ginger bug, elderflower champagne and kombucha.
- Introduction to Tempeh Making — a guide to growing protein and culturing soybeans.
- Chinese Cabbage Kimchi (Baechu Kimchi) and Fermenthings' Kimchi Stew — a recipe plus a dish built from aged kimchi and living broth.
- Master of Spices — chilli, heat and preservation history.
- Curtido — the Latin American cabbage ferment, framed alongside sauerkraut and kimchi.
H3 Who it suits
It is most useful if you already cook a little and want to move from following a single recipe to understanding a process: why salt ratios matter, how a ginger bug differs from a kombucha culture, or how a ferment can become a broth for another dish. The cultural and historical angles — Java for tempeh, trade routes for heat — make it readable for curious eaters too, not only practitioners. It is not aimed at people wanting industrial food-science data or a structured certification path.
H3 How to use it
Start with one ferment you can taste within a week, such as the ginger bug or a small batch of kimchi, rather than the longer projects. Fermentation is mostly about observation, so keep notes on temperature, salt and timing. If you want a second reference point, Wikipedia covers the microbiology and food-history background of topics like kimchi and tempeh, and Reddit communities such as r/fermentation are useful for troubleshooting a batch that smells or looks wrong.
How do I make tempeh at home?
For a first batch, follow a tested home method rather than improvising ratios. The Fermenthings wiki frames tempeh as an Indonesian technique for turning soybeans into something "nourishing, stable, and deeply satisfying" in a warm, humid climate — which tells you the two things that matter most: preparing the beans properly, and holding them at a steady warm temperature while the mould grows.
Ferment Lab: Fermenthings Open Source Wiki covers tempeh making as an introductory topic, alongside related ferments such as kimchi, ginger bug, kombucha and miso. Use its tempeh page as your starting procedure, and read the kimchi and curtido pages if you want to understand how salted vegetable ferments differ — they rely on salt-tolerant bacteria, while tempeh depends on a mould, so the equipment and hygiene expectations are not interchangeable.
What the process involves
- Beans: whole soybeans are typical, but the wiki's approach treats tempeh as a general method, so you can also try other beans or grains once you have one batch working.
- Dehulling and splitting: many home methods crack and skin the beans so the mould can penetrate evenly.
- Cooking: the beans are cooked through and then dried well on the surface — excess water is a common cause of failure.
- Inoculation: a tempeh starter containing Rhizopus mould is mixed through the cooled beans.
- Incubation: the beans are spread in a thin layer, usually in a perforated bag or container, and kept warm for roughly a day or two until the white mycelium binds them into a firm cake.
A practical first attempt
Buy a known tempeh starter rather than trying to grow mould from a previous batch or from the environment — this is where beginners lose batches. Cook, drain and dry the beans until they are cool enough to handle and no longer steaming, then mix in the starter according to its instructions. Pack the beans loosely, no more than a couple of centimetres thick, and incubate somewhere reliably warm. Check after 24 hours: you want even white fuzz and a slight sweet, mushroom-like smell. Black or green patches, or a sour, ammoniac smell, mean discard it.
Trade-offs to expect
Tempeh is faster than many ferments — often ready within a day or two rather than weeks — but it is less forgiving about temperature and moisture. If your kitchen is cool, you will need a warm spot or a simple incubator; if your beans are wet, the mould will struggle. Once you have a reliable batch, the wiki's broader recipe collection shows where tempeh fits: it is a protein base you can then marinate, fry or add to dishes, much as the site treats miso as an ingredient rather than a single soup.
Next step: read the wiki's tempeh introduction in full before buying starter, and note down your incubation temperature and timing for the first batch so you can adjust the second.
What are the best ways to bottle and preserve summer flavors like elderflower and ginger?
For bottling summer flavors at home, the most reliable routes are wild-fermented sodas (ginger bug, elderflower champagne) and kombucha. All three use active cultures to create carbonation instead of added yeast or force-carbonation, so the same skills carry across them.
Ferment Lab: Fermenthings Open Source Wiki groups ginger bug, elderflower champagne and kombucha together as "three ways to bottle a summer," which is a useful framing: one method, three flavor profiles.
Choosing between the three
| Method | Starter | Flavor character | Main trade-off |
|---|---|---|---|
| Ginger bug | Fresh ginger + sugar, kept active | Spicy, gingery, lightly sweet | Needs regular feeding to stay alive |
| Elderflower champagne | Wild yeasts on elderflowers | Floral, delicate, seasonal | Only possible during the short elderflower bloom |
| Kombucha | SCOBY + sweet tea | Tart, tea-forward, endlessly variable | Requires a ongoing culture and a week or more per batch |
Practical guidance
- Bottle in pressure-safe glass. Fermentation keeps producing CO2 after bottling; use flip-top or thick brewing bottles, never thin decorative glass.
- Add a little sugar at bottling. This is what the culture consumes to carbonate the drink. Too much plus warm storage equals gushing or broken bottles.
- Burp and chill. Open bottles briefly every day or two during the first days, then refrigerate once carbonation suits you. Cold slows the culture down.
- Flavor by infusion, not just syrup. Elderflowers, herbs, fruit and citrus peel can go into the bottle or the primary ferment; Fermenthings' seasonal approach treats the ingredient as the starting point rather than a fixed recipe.
A concrete scenario
You have a jar of ginger bug bubbling on the counter in July and a bag of elderflowers from a weekend walk. Feed the bug, brew a light elderflower infusion, combine, bottle in flip-tops, and check daily. If it over-carbonates, refrigerate immediately and open over a sink. If it stays flat, leave it another day at room temperature.
Next step
Start with one method rather than three. A ginger bug is the lowest-commitment entry point because it needs no SCOBY and no special tea. Once you can reliably carbonate a batch, the elderflower and kombucha versions become variations on a skill you already have.
How can I use miso in sweet recipes beyond soups and marinades?
Miso works in sweets because it adds salt, glutamate and a little fermented complexity that plain salt cannot. In a butter cookie, for example, a spoonful of mild white or red miso deepens the browned-butter and vanilla notes and keeps the biscuit from tasting flat. The page itself makes this point with a miso shortbread-style cookie: once you treat miso as a general ingredient rather than a soup base, it moves easily into baking.
Ferment Lab: Fermenthings Open Source Wiki
H3 Practical ways to use it
- Cookies and shortbread: cream 1–2 teaspoons of white miso into the butter or dough; pair with brown sugar, chocolate or sesame.
- Caramel and sauces: whisk a little miso into caramel, butterscotch or a chocolate ganache for a salted-caramel effect without extra salt.
- Ice cream and custards: add miso to the base before freezing or churning; it rounds out vanilla, roasted sesame or peanut flavours.
- Fruit bakes and compotes: a small amount with apples, pears or plums mimics the salty-sweet contrast of salted fruit preserves.
H3 Choosing the right miso
- White (shiro) miso is the safest starting point: mild, sweetish and less likely to dominate.
- Red (aka) miso is saltier and more assertive; use less and expect a stronger savoury edge.
- Long-aged or very dark miso can overwhelm delicate cakes, so reserve it for chocolate, caramel or nut-based recipes.
H3 A quick decision rule Start with about 1 teaspoon per 250 g of flour or per cup of custard, taste the raw dough or base, and adjust. If the mixture already contains salted butter, soy sauce or a salty add-in, begin lower. The goal is not to taste miso as miso, but to notice that the sweetness tastes fuller and less one-dimensional.
For a first attempt, take a plain butter or shortbread recipe you already trust and add white miso at that low starting level. If you want a worked example, the miso cookie entry on the wiki is the most direct place to begin.
What is the difference between kimchi, sauerkraut, and curtido?
Kimchi, sauerkraut and curtido are all salted, fermented cabbage traditions, but they differ in seasoning, fermentation style and how they are eaten.
Kimchi (Korean) is typically made with napa cabbage (baechu), salted first, then mixed with a paste that usually includes gochugaru (Korean chili flakes), garlic, ginger, scallion and often fish sauce or salted shrimp. It ferments at cool room temperature or in the fridge, developing a sour, spicy, deeply savoury flavour. It is eaten as a banchan side dish, cooked into stews and fried rice, and used as an ingredient in its own right. The Fermenthings wiki includes both a baechu kimchi recipe and a kimchi stew built on aged kimchi, which shows how the same ferment moves from condiment to cooking base.
Sauerkraut (Central and Eastern European) is usually just cabbage and salt, sometimes with caraway, juniper or bay. The salt draws water from the cabbage, and the cabbage's own lactic acid bacteria do the work. The result is tangy, crunchy and comparatively clean-tasting. It is eaten cold with sausages or potatoes, or cooked with pork, apples and wine. Because it has few added ingredients, it is the easiest of the three for a beginner to make and the easiest to judge by taste alone.
Curtido (Salvadoran) is a lightly fermented cabbage slaw, commonly made with cabbage, carrot, onion, oregano and sometimes chili, covered with salted water or a mild vinegar brine. It is less sour and more fresh-tasting than sauerkraut, and it is usually served as a relish alongside pupusas, grilled meat or beans. The Fermenthings wiki calls it "the Latin cousin of sauerkraut and kimchi," which is a fair short description: the technique overlaps, the seasoning and the role at the table do not.
| Kimchi | Sauerkraut | Curtido | |
|---|---|---|---|
| Base | Napa cabbage, often radish | White cabbage | Cabbage plus carrot and onion |
| Key seasonings | Chili flakes, garlic, ginger, fish sauce | Salt, sometimes caraway | Oregano, mild chili, sometimes vinegar |
| Ferment character | Sour, spicy, funky, complex | Sour, crisp, clean | Mildly sour, fresh, crunchy |
| Typical use | Side dish, stews, fried rice | Side dish, cooked with pork or potatoes | Relish for pupusas and grilled food |
If you are deciding what to make first, choose by the flavour you actually want rather than by difficulty. Craving heat and umami: kimchi. Want a neutral, versatile ferment that keeps for months: sauerkraut. Feeding tacos, pupusas or grilled meat this week: curtido, since it can be ready in a few days.
A practical next step is to read the Fermenthings kimchi and curtido pages side by side at Ferment Lab: Fermenthings Open Source Wiki and compare their salt and brine ratios, then pick one and keep notes on room temperature, since that variable affects all three ferments more than the recipe wording does.
How do I make kimchi stew with aged kimchi?
Aged kimchi is the right starting point: as it sours, its acidity and deep funk carry into the broth instead of tasting flat. The wiki's own kimchi stew entry describes exactly this situation — a recipe that sat imagined for years until two things came together: a daily miso soup production supplying rich, living broth, and deeply aged kimchi brought by friends. That is a useful pattern to copy even if your kitchen looks nothing like theirs.
The basic move
- Render the kimchi. Cut aged kimchi into bite-sized pieces and sauté it in a little oil with its own juice, plus onion if you have it. Let it cook until the edges soften and the smell turns sweet rather than sharp.
- Add a living broth. The wiki's version leaned on miso broth; any savoury stock works. Miso, anchovy stock, or a light meat broth all give the stew a base that can stand up to sour kimchi.
- Season with restraint at first. Aged kimchi is already salty and acidic. Add gochugaru or gochujang for heat and colour, a pinch of sugar or a splash of the kimchi liquid to balance, and taste before adding more salt.
- Simmer with something absorbent. Tofu, pork belly, or mushrooms are common; they soak up the sourness and soften it.
- Finish late. Spring onion, sesame oil, or a raw egg stirred in off the heat keeps the top notes intact.
Choosing your kimchi
| Kimchi age | What it does in stew | Best use |
|---|---|---|
| Fresh (days old) | Crunchy, mild, little acidity | Eating raw, as a side |
| Moderately sour (weeks) | Balanced tang, still holds shape | Quick stews, fried rice |
| Deeply aged (months) | Strong sourness, soft texture, complex | Stew, jjigae, braises |
If your kimchi is only mildly sour, the stew will taste thin; add a spoonful of gochujang and simmer longer. If it is very old and very sour, use less of the liquid and balance with a little sugar or a starchy element like potato.
A practical next step
Before cooking, taste a piece of the kimchi on its own. That single bite tells you how much seasoning the pot will need. Then read the wiki's kimchi stew page at Ferment Lab: Fermenthings Open Source Wiki alongside its Baechu Kimchi recipe, so you can see how the same batch behaves raw and cooked. If you are starting from scratch, the kimchi page gives you the fermentation timeline that determines what your stew will taste like weeks later.
User reviews (0)