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Hard kombucha fermentation

Hard Alcoholic Kombucha Recipe

Lisa
If you love homebrewed kombucha and want to give it a nice twist, you're going to love making hard alcoholic kombucha at home! It's the perfect blend of kombucha's benefits with a little extra kick. 
Prep Time 45 minutes
Resting Time 10 days
Total Time 10 days 45 minutes
Course Drinks
Cuisine American
Servings 1 Gallon

Equipment

  • Gallon glass jug (carboy, mason jar, or 2 half gallon jars)
  • Air Lock(s) (make sure they fit your specific jars)
  • Long spoon
  • Separate glass jar or bottles (to transfer finished hard kombucha into)
  • 16 oz bottles (6-7), or 12 oz bottles (7-8) (optional for flavoring and carbonation - make sure they're carbonation safe bottles)
  • Measuring cup with spout, or funnel (optional for flavoring and bottling)

Ingredients
  

For the Main Ferment:

  • 1 gallon plain kombucha tea (from a first ferment only)
  • 1 cup filtered water
  • 1 cup cane sugar (reserve 1 tablespoon for activating the yeast)
  • 1 tsp champagne yeast or wine yeast (I prefer champagne yeast: Lalvin EC-1118)

Optional Ingredients for Flavoring and Bottling, and to Create Carbonation:

  • Fruit juice or fresh fruit (pureed, mashed, diced, or whole)
  • Herbs and spices of choice (optional)
  • Organic cane sugar (only if you don’t want to use fruit/fruit juice, or if you’re using fruit with low sugar content like just about any berry, cranberries, rhubarb, lemon, or lime)

Instructions
 

Main Ferment:

  • If your initial batch of plain kombucha still has the SCOBY in it, remove it along with 2 cups of the kombucha tea, and place it in a glass jar. Cover the top with a breathable cloth, like a cheesecloth or thin tea towel, and secure it with a rubber band. Store it in a cool and dark location, like a pantry or cabinet. This is what you'll use to brew a future batch of regular kombucha.
    Kombucha SCOBY Hotel
  • Warm 1 cup of water and dissolve 1 tablespoon of the sugar into it. Let the water cool to just slightly warmer than room temperature, then stir in 1 teaspoon of yeast. Let it sit for approximately 30 minutes to activate (it's active when it's foamy with a few bubbles).
    Hard kombucha yeast
  • While you wait for the yeast to activate, pour the rest of the sugar into the kombucha tea. Stir for a minute or two to dissolve the sugar.
  • Pour the kombucha into your gallon glass jug, then mix in the yeast slurry (if you are using two half gallon jars, give the slurry a quick stir, then pour half of it into each jar).
    Hard alcoholic kombucha yeast
  • Follow the instructions for your specific airlocks, then close the lids on the jars. Leave them out to ferment in a cool location away from direct sunlight. After a few hours to a couple of days you should start seeing bubbles forming inside the jars and in your airlocks.
    Hard alcoholic kombucha fermentation
  • Let them ferment for about 7-14 days, or until the activity in the airlock slows down. The total fermentation time mainly depends on the temperature in your home. The cooler it is, the slower it ferments; the warmer it is, the faster it ferments.
    Hard kombucha airlock
  • When you no longer see bubbles or pressure in the airlock, remove the lid and taste your hard kombucha. It should taste like regular kombucha, but on the drier side and with a slight champagne flavor.
  • Whether you choose to stop here, or move on to adding flavors and carbonation, you'll need to first remove any yeast build-up or pellicles that may have formed on the surface of your jars, but do not mix the hard kombucha at this point.
    hard kombucha yeast formation
  • Transfer your finished kombucha into another jar or smaller bottles using a funnel. Do this carefully so you don't include the yeast sediment at the bottom of your jar(s). If you don't separate your finished hard kombucha from the yeast, it may develop an off-putting taste.
    hard kombucha yeast sediment
  • Once transferred, secure the bottles with regular lids and store them in the refrigerator to stop them from fermenting longer. 
    Bottling hard alcoholic kombucha

Optional Final Fermentation - Flavoring and Bottling:

  • If using 12 oz bottles, add 1/4 cup of fruit juice, or pureed or fresh fruit, into each of your bottles (using a funnel will help). If using 16 oz bottles, add 1/3 cup. If you are not using fruit or juice, or are using fruit with low sugar content, add 1 teaspoon of sugar to each 12 oz bottle, or 1.5 teaspoons to each 16 oz bottle.
  • Top each bottle off with kombucha, leaving about 1 inch of headspace at the top of the bottles. Place all of the lids on tightly, and then invert them gently a few times to incorporate the fruit/sugars.
    Hard kombucha flavoring and bottling
  • Leave the bottles out on your counter or pantry, away from direct sunlight, for 2-4 days. If it’s pretty warm in your house, check them after 1 day. At the 1-2 day mark, open a bottle to check for carbonation. If the carbonation is to your liking, refrigerate all of the bottles to stop the fermentation and carbonation process. If you want more carbonation, leave them out for another 1-2 days, then check again. Once your hard kombucha has reached the level of carbonation that you like, transfer the bottles to the refrigerator to stop further fermentation.
  • Strain the fruit pulp before enjoying (optional, some people like the pulp). You now know how to make hard alcoholic kombucha, and can share the recipe with friends and family. Cheers!

Notes

  • See post for creative hard kombucha flavoring ideas.
  • Similar to beer or hard cider, the alcohol content in hard kombucha is usually between 3% and 7%, depending on the type of yeast you use, how much sugar you add, and how long it ferments.
  • If you're wondering why we only add 1 tablespoon of sugar to 1 cup of water for the yeast activation, it's because yeast doesn't need a large amount of sugar to begin fermentation. Too much sugar can actually overwhelm or stress the yeast, and potentially slow it down or disrupt the fermentation process.
  • You will likely see a pellicle or yeast build-up on the surface of your jars a few days after adding the yeast. This is normal with kombucha (but not so much with homebrewed wine). Once fermentation is complete, you can either throw them away or compost them.
  • Hard kombucha ferments best between the temperatures of 75-85°F (24-29°C), although this isn’t a strict rule. The warmer it is, the faster it ferments; the cooler it is, the slower it ferments. It is not recommended, however, to let it ferment in temperatures below 70°F (21°C) as it could slow to a crawl or not completely ferment. Use a heating mat around your jars if your room temperature is below 70.
  • Store your finished hard kombucha in the refrigerator to keep the fermentation process down and to maintain its flavor.
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