Spicy Watermelon Kombucha Recipe

Perfect For The Summertime Heat

Spicy Watermelon Kombucha Recipe

Talk about a party in your mouth! All this kombucha is missing is the Tequila. The tartness of the kombucha with the watermelon and lime transform this drink into a real fiesta for your taste buds. Perfect for the summertime heat! Speaking of the heat, the cayenne pepper sneaks up on you right at the end. It isn’t overpowering at all. It just keeps you wanting more! Of course, you can add as much or as little cayenne as you’d like. It’s important that you enjoy it, so if you don’t like heat, you can literally add none, and it would still be delicious. I’m a spice junkie, so I’ll keep adding more to see what I can handle. Start with a little and add more if you’d like!

Spicy Watermelon Kombucha recipe


It’s important to note that brewing homemade kombucha is almost always a two-step fermentation process. Brewing kombucha is only a one-step process for those who prefer an unflavored flat kombucha. Otherwise, the steps consist of a primary fermentation and secondary fermentation.

  1. Primary Fermentation: The primary fermentation is the first step of the kombucha brewing process. This is where your SCOBY transforms regular sweet tea into the tart and slightly sweet kombucha we love. At the end of this stage, you will have finished kombucha, but it will be flat and unflavored. Have you skipped this step? Then check out our guide on making kombucha at home or our guide on making jun kombucha at home. Traditional kombucha is going to yield a bolder brew, while jun kombucha is milder and a bit more tart.
  2. Secondary Fermentation: The secondary fermentation is the step where you bottle, carbonate, and flavor your kombucha by the addition of sugar and flavors. This step is essentially adding a bit of sugar/flavor to each airtight bottle and letting it ferment a little longer, allowing the yeast to carbonate the beverage in an airtight environment naturally. How exactly does this happen? See our post on kombucha secondary fermentation here.

Since this recipe is for the secondary fermentation, to make this recipe, you’ll need to have kombucha that has finished the primary fermentation and ready to bottle.

Kombucha brewing supplies


  • Kombucha: You need kombucha that has completed primary fermentation and is ready to bottle and flavor.
  • Watermelon Pure/Juice: A sweet tangy flavor that dominates the flavor of this drink. 
  • Ground Cayenne Pepper: The amount you use will determine how spicy your drink is.
  • Lime Juice: Fresh lime juice is tart and bright. It’s a great addition to any water kefir recipe but also plays well with other citrus fruits.


This recipe makes one 16 fluid ounce bottle. For a 1-gallon batch, make 7 16 ounce bottles of kombucha or times the ingredients by 7. Before beginning this recipe, you will want to:

  1. Reserve 12 – 16 fluid ounces of kombucha and your pellicle from your completed primary fermentation and set aside. It’s best to pour from the top of the brew jar as the bottom will have a much higher yeast concentration. You will use this as your starter for your next gallon batch of kombucha.
  2. With your kombucha starter tea and SCOBY placed aside, you will now have enough kombucha left to make seven 16 oz bottles. These bottles are the most popular as they are considered the best bottles for kombucha secondary fermentation, but any other airtight bottles made for carbonation will work.  

Spicy Watermelon Kombucha Recipe

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Recipe by Fermentaholics Course: Kombucha, Watermelon, Spicy Watermelon KombuchaCuisine: KombuchaDifficulty: Easy

16 FL Oz Bottles



Prep time



Second Fermentation

1-3 Days

This spicy watermelon kombucha recipe is for one 16 fluid-ounce bottle. For a gallon batch, make seven bottles. To scale this recipe to a gallon batch, multiply the ingredients by seven or toggle the serving size up to seven above. Before bottling your kombucha, remove the SCOBY pellicle along with 12-16 ounces of kombucha starter tea from your brew, and reserve for your next batch.


  • 16 Oz Kombucha from a completed primary fermentation.

  • 1/2 Cup Watermelon Puree/Juice

  • 1/8 -1/4 TSP Ground Cayenne Pepper (Adjust To How Spicy You Like It)

  • 1 TBSP Lime Juice

  • 1 16 Oz Kombucha Bottle(s)

  • Funnel

  • Measuring Spoons

  • Blender


  • Remove the SCOBY from the jar: With clean hands, take the SCOBY and place it in a clean container. Measure out one to two cups of kombucha and add it to the container with the SCOBY. This is the starter for your next brew.
  • Place your clean 16 oz bottles in the sink.
  • Using a funnel, pour 1/2 cup of watermelon puree into each jar along with cayenne pepper and lime juice.
  • With a big spoon, stir up up the kombucha in the jar to suspend the yeast. This will help obtain more carbonation during the secondary fermentation.
  • Using a funnel, slowly pour kombucha from the brew jar into the bottles, leaving about one inch of headspace from the top of each bottle. The kombucha may foam up with the puree, so go slowly and let it settle in between. Leave about 2 cups of kombucha in the jar with the SCOBY for the next brew.
  • Tightly place the caps on each bottle
  • Keep bottles at room temperature for 1-3 days, depending on temperature.
  • Once per day, you’ll want to “burp” the bottles by removing the cap to allow built-up pressure to escape and place the cap back on. As soon as you put the cap back on, the carbonation will begin to build back up, so no worries about it getting flat. Try not to skip this, or you will have kombucha all over your face and your kitchen when you do go to open it.
  • When you are happy with the flavor and fizziness of your kombucha (1-3 days), place bottles in the fridge to chill and halt the fermentation.
  • Enjoy your kombucha by the glass or use it in salad dressings, smoothies, chia seeds, etc.!


  • First-time brewers may find it helpful to substitute a glass bottle for a plastic bottle of equal size. Fill the plastic bottle as directed above, leaving 1-2 inches of empty headspace at the top. This plastic bottle will now be used as a pressure gauge. Once this bottle becomes rock solid, you will know the remaining are ready. This method can help prevent bottle bombs.
  • Try adding a shot of your favorite Tequila to make an out of this world kombucha margarita!! Arriba!!

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