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I designed this course to teach people who are new to fermentation how you can brew and maintain a kombucha culture at home. We will discuss what exactly kombucha is and how you can save money by making your own.
The course is taught mostly by short videos but all content is also provided in a written summary for each lecture and PDF's. It is structured in the order in which you would prepare a batch of Kombucha and separated into the following main topics:
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|Section 1: Introduction|
Topics included in this lecture include:
I designed this course to teach beginners (who are new to fermentation) how you can brew and maintain a kombucha culture at home. We will discuss what exactly kombucha is and how you can save money by making your own. The course is taught mostly by short videos but all content is also provided in a written summary for each lecture. The course also provides some PDF’s for quick access and reference for future brewing.
What is Kombucha
Kombucha is a sweetened fermented tea and ancient elixir that has been around for thousands of years. The liquid consists of a mixture of caffeinated tea, such as a green or black tea, and a sugar source, such as granulated cane sugar. On top of tea sits the SCOBY. Scoby is an acronym for: Symbiotic Colony Of Bacteria and Yeast aka a Mother due to its ability to reproduce. The tea feeds the scoby, which digests the caffeine and sugar to produce organic acids, vitamins, amino acids and enzymes. Kombucha, much like yoghurt, contains probiotic microorganisms, which are great for promoting a healthy gut and digestion. There are many health claims about the benefits of drinking Kombucha however there’s not a lot of research done to support these claims. Most of the research that has been done is experimental from people who have been culturing kombucha for a long time. These benefits may vary but some include: better digestion and gut health, increased energy levels, and aid in detoxification of the liver. The great thing about Kombucha is that it has a very low pH (around 2.5-3.5), making it less risky to brew at home!
Meet your instructor
My name is Amber Brown and I am a Vancouver based medical microbiology technologist, a yoga instructor, and a health and outdoor enthusiast. Kombucha specifically interests me because of my microbiology background and my passion for health. I’ve been brewing my own kombucha at home for many years and, though trial and error experimenting with different sugars and methods, I’ve discovered a process that produces, in my opinion, the best tasting and healthiest kombucha.
|Section 2: Brew Preparation|
In this lecture we will discuss:
Covered in this lesson: How to grow your own scoby from scratch
However, a quicker and easier option is to buy a scoby from a reputable source.
|Section 3: Fermentation|
In this lesson we will discuss:
First Stage Fermentation
This is when the cultures digests the caffeinated tea and sugar to ferment, producing organic acids, vitamins, amino acids and enzymes as by products. Every week I make a new batch of tea and decant the current batch. The first batch you make with the mother you may need to wait a little more than a week, but you can sample some of the liquid, if it’s very sweet let it ferment longer but if it has a very strong vinegar taste it may have fermented too long. There is nothing wrong with letting it ferment longer, it is really just a matter of taste preference.
Clean your supplies
Ensure all jars are clean and sanitized before placing your scoby in them. See the attached resource "General Cleaning Procedure" for the detailed cleaning method. I clean my main vessel once every two to four months just so that balance of yeast doesn't get out of wack (you will see a lot of debris at the bottom of the jar), but it's up to you how often you clean.
Adding the sweetened tea to your culture
Once the tea has cooled, pour it into the kombucha jar with the mother and starter liquid (leftover from the last batch). Careful not to disturb the mother too much when you do this. You can get someone to hold the jar on an angle so that I can pour the tea in very slowly without shaking up the mother. If the scoby sinks don’t worry. Cover with a thick cheese cloth or coffee filter and secure with a rubber band. Place the jar in a dry, dark and warm place where it won’t be disturbed and let it sit for ~7days. The longer you let it sit the more acidic it will get, less time will make it sweeter. It’s personal preference.
Begin the second and final part of fermentation before your tea is ready to drink. In this lesson we discuss:
After it is poured from the main reservoir, the yeast will continue to ferment the sugar in the tea, producing carbonation, this is known as second stage fermentation. This is an excellent time to infuse your kombucha with any additional flavors. Growlers work best for this step, they seal tight enough while the rubber stopper still lets a little air out to avoid explosions.
Decanting your kombucha after first stage fermentation is complete
After approximately one week your kombucha should be ready for second stage fermentation. Do a taste test and if it tastes ready you can decant it. Do this over the sink:
Brew a new batch of tea and add it to the existing starter liquid and scoby. For every new batch you make you will need to have some starter liquid left in with the mother (~1-3cups).
Flavoring is optional, you can skip this step if you’d like and just decant the kombucha for second stage fermentation without adding any extra ingredients. You can use fresh fruit, fruit/juice concentrates, ginger, food grade essential oils and syrup to flavor.
Ways to drink and enjoy
Although some argue that this is unnecessary, I like to dilute my kombucha with carbonated water. After second stage fermentation is complete I drink my kombucha by adding half kombucha to a glass and half carbonated water. I also add ice to my booch, I find it amps up the carbonation a bit more. Use as a healthy substitute for soda or alcohol, drink in the morning on an empty stomach for maximum benefit and share your kombucha with friends/family!
|Section 4: Maintenance and Storage|
In this lesson we discuss:
You will want to clean your main vessel, the one that houses the “mother”, once every few months just so that the yeast/bacteria balance doesn’t get out of wack. You might notice a lot of debris at the bottom of your jar (that’s yeast!), this is ok but when it starts to build up you may want to clean so that the culture balance doesn’t get out of wack. Always clean your hands very well before touching your scoby!!
As the culture matures you may notice that your scoby starts to thicken and multiple, forming multiple layers usually at the top of the jar with each brew. With clean hands, you can gently pull the layers apart and store extra scobys in a scoby hotel. If the scobys don’t easily separate, you can use a stainless steal knife or pair of scissors to cut the scobys apart.
Storage of extra scobys
Over time you will start to accumulate scobys as the culture grows and multiples. It is a good idea to save the extras so that you have backups if your main scoby gets contaminated or molds. You can create a scoby hotel by storing all the extra scobys together in a galloon jar. They can often exist in the jar for months before you need to feed or clean to remove excess yeast and keep the bacteria:yeast ratio in check.The liquid in the scoby hotel is great for using as starter liquid in any new culture or to give your current culture a boost.
Do not store extra scobys in the refrigerator! This can kill them or cause them to mold!
It is important to be able to recognize when something is off with your culture. With every batch examine your scoby. Here are some important things to be aware of:
In this lecture I will explain some common causes of a culture that is taking a long time to ferment and scobys are not growing/multiplying. It can be hard to diagnose what is wrong with a culture without seeing it and observing how the brewer is brewing. However some possible reasons for this are as follows:
Continuous brew method
|Section 5: Flavor inspiration & ideas|
This is when you get to become creative! You can experiment with any flavors but I've included some of my favorites in this lecture and the attached PDF.
Remember, always wash fresh fruit very well before cutting. I suggest opening bottles over the sink as sometimes the added sugars in the fruit cause a lot of gas build up.
|Section 6: Bonus Lesson: The science of Kombucha|
In this lesson I will explain some of the science behind a Kombucha culture, with a specific focus on Microbiology.
Amber Brown is a Vancouver based Yoga Instructor and Medical Microbiology Technologist with a passion for health and the outdoors.
Amber has been teaching yoga since 2008 and brewing kombucha for 9+ years. Her passion for health and knowledge of microbiology have contributed to her understanding of what makes an incredibly delicious and healthy batch of Kombucha.
Amber has worked with the Globe & Mail, producing a series of online yoga instructional videos, and taught Kombucha brewing workshops and information sessions in Vancouver. Now she wants to share her passion and knowledge of Kombucha & fermentation with the online community.
You can often find her one of three places: on her yoga mat, in the lab, or exploring in the mountains!