How to Flavor Kombucha
Purees, juices, syrups, herbs and spices — how to prep each one, how much to use, and the one rule that protects your SCOBY.
Kombucha Basics: Flavoring · Watch on YouTube
- Flavor only after first fermentation — never in the jar with your SCOBY.
- Add flavorings in stages and taste: you can add more, you can't take it out.
- Aim slightly too sweet — F2 dries the brew out a touch.
- Puree/juice fruit for better flavor and better fizz.
- There is no wrong flavor. If it tastes good to you, you did it right.
The one hard rule
Flavorings and your SCOBY don't mix. Fruit, oils, spices and herbs in the first-fermentation vessel can throw off the culture's balance (and a pellicle that's been swimming in fruit shouldn't go back to plain brewing). Ferment plain; flavor at bottling. If a flavoring accidentally touched your SCOBY, here's what to do.
Prep methods, ranked by how often Ange reaches for them
Fresh fruit, pureed
The gold standard for flavor and carbonation. Blend fruit with a splash of kombucha to loosen it; strain later at pouring time if you don't love pulp. Roughly a pound of fruit per gallon is a solid starting point — then trust your taste buds.
How to Prep Fruit Flavorings (Detailed Walk-through) · Watch on YouTube
Juices — fresh or store-bought
Fresh-squeezed citrus, juiced pineapple and apple, or a good store-bought pomegranate juice all work beautifully. Skim any foam off fresh juices. A splash of lemon or lime is Ange's secret brightener: you won't taste "lemon," you'll just taste more.
Herbs, spices & flowers
Bruise herbs (rosemary, thyme, lemongrass, mint) to release their oils and tuck a whole sprig into the bottle — poke it below the liquid line. Spices and florals are potent; start small.
How to Prep Herbs, Spices & Floral Flavorings · Watch on YouTube
Fruit syrups
Simmered fruit syrups concentrate flavor, keep well, and double for cocktails and sodas. Great for out-of-season fruit.
Making Fruit Syrups · Watch on YouTube
Fresh/frozen fruit pieces
A few slices or chunks give a more subtle fruit flavor that lets the tea shine — totally valid, but the most common cause of weak fizz: the yeast can't reach the sugar locked inside intact fruit. If you love pieces but miss the bubbles, add a teaspoon of sugar to each bottle along with the fruit.
Store-bought juices, canned or frozen fruit
A mixed bag, honestly. Ange has experimented across the juice aisle, the refrigerated case and the freezer: some brands work great, some make funky flavors, and some (especially shelf-stable, pasteurized ones) leave kombucha completely flat no matter how long it bottle-ferments. Refrigerated OJ can leave a metallic aftertaste; canned and frozen fruit can turn funky too. Success depends on finding brands that agree with your particular SCOBY — experiment in single bottles first.
Dried fruit, jams & preserves
Dried fruit works in a pinch, with the same sugar-access problem as fruit pieces (plus whatever preservatives came along for the ride — they can add off-flavors). As for the internet's beloved raisin trick: if sweetness is the goal, just use more of your actual flavoring or a teaspoon of sugar — Ange hasn't found raisins to outperform either. Jams and preserves are legitimately good: about a tablespoon or two per 16-oz bottle, since the flavor is concentrated.
More tea (yes, really)
Flavored teas and herbal infusions are off-limits in F1 — but in the bottle, they're fair game! Steep, add, and include about a teaspoon of sugar per bottle to keep the carbonation fed if the tea isn't sweetened.
Extracts & essential oils
Some brewers use vanilla or almond extract, or lavender oil. Ange hasn't personally tried it yet (this page gets updated when she does!) — if you go there, make sure everything is food-safe and go sparingly: certain oils and the alcohol in extracts have anti-microbial properties that can work against the good bacteria in your bottle. In small amounts, the risk is low.
How much flavoring?
Ange's general rule: about ¼–⅓ cup of puree or juice per 16-oz bottle. But there's no universal number — the same fruit varies by season, ripeness and processing, and concentrates need much less. So: add half of what seems right, stir, taste, adjust. Stop when it's a touch sweeter than you'd like to drink (the yeast will eat the difference). Want it less sweet? Bottle a slightly more acidic brew, or use less fruit. Sweeter? Literally just add more cane sugar to the flavoring or the bottle.
Flavor without fizz? Fizz without flavor?
Flavor, no carbonation: after F1, remove your SCOBY (or pour the kombucha into a pitcher), add your fruit, and adjust to taste — more fruit, or a longer steep for herbs. Drink whenever it tastes great. No bottles, no sealed containers, no waiting. Carbonation, no flavor: bottle plain kombucha airtight with ½–1 teaspoon of plain sugar per bottle and ferment 2–7 days — unflavored brews take longer to carbonate (sometimes up to two weeks, depending on room temperature), so be patient. The carbonation guide →
A masking-tape label on every cap ("straw-ginger, bottled 6/2") turns random luck into a repeatable house recipe. The printable brew log gives you a page per batch.