Tepache is one of the most satisfying quick ferments you can make because the main ingredient is scraps, pineapple rind and core, the parts most people throw away. It's a traditional Mexican fermented beverage that takes 24–72 hours from start to glass, needs no special equipment, and produces a lightly effervescent, tangy-sweet drink with genuinely tropical flavor. I make a batch every time I buy a whole pineapple. The fermentation is wild and fast; the result is always worth it.
Recipe: Pineapple Tepache (1 quart)
| Ingredient | Amount | Notes |
|---|---|---|
| Pineapple rind + core | From 1 medium pineapple | Rinse briefly; do not scrub away wild yeasts on skin |
| Piloncillo or brown sugar | 1/4 cup (50g) | Piloncillo is traditional; brown sugar is a fine substitute |
| Filtered water | 1 quart (1L) | Non-chlorinated; chloramine inhibits wild fermentation |
| Cinnamon stick | 1 small (2-inch) | Optional but traditional |
| Whole cloves | 2–3 | Optional; adds warmth |
Process
- Cut the rind from a whole pineapple and core it. Rinse the rind lightly under water, you want to remove surface dirt but keep the wild yeasts on the skin. Do not scrub.
- Place rind and core pieces in a clean large jar or pitcher. Add sugar, cinnamon, and cloves if using.
- Pour 1 quart of filtered water over everything. Stir to dissolve sugar. The rind should be submerged, weigh it down with a small plate or zip-lock bag filled with water if needed.
- Cover loosely with a cloth or loose lid (not airtight, fermentation produces CO₂). Ferment at room temperature (72–82°F/22–28°C).
- Taste starting at 24 hours. At 24 hours: lightly sweet with a faint tang. At 48 hours: noticeably tart, effervescent, tropical. At 72 hours: more sour, drier, stronger flavor. Harvest when it tastes right to you.
- Strain out the pineapple solids. Refrigerate immediately. Drink within 3–5 days, it continues fermenting slowly in the fridge.
What affects the flavor
The pineapple rind carries Saccharomyces and non-Saccharomyces wild yeasts along with lactic acid bacteria, the fermentation is a cooperative one that produces both alcohol (minimal, under 2%) and lactic acid. Piloncillo adds a molasses depth that white sugar can't match; if you use it, dissolve it in a small amount of warm water first since it's dense. Temperature drives fermentation speed significantly: at 80°F/27°C, tepache can be ready in 24 hours and overfermented (very sour) by 60 hours. At 72°F/22°C the 48-hour mark is typical. In summer, check it more frequently.
Common Questions
Can I use the pineapple flesh in tepache?
You can add flesh for a sweeter, fruitier tepache, but the traditional and most economical version uses just rind and core. The flesh ferments very quickly and can make the tepache murky and overly sweet if too much is added. If you add flesh, reduce the sugar proportionally and check fermentation progress at 18 hours rather than 24. The rind is what contributes the most wild yeast population and the tannic, complex character that distinguishes good tepache from sweet pineapple juice.
I see white foam on top. Is that mold?
White foam on the surface during active fermentation is almost always CO₂ bubbles and yeast protein, completely normal and expected. Skim it off if you prefer a cleaner appearance; it doesn't affect flavor. Actual mold (fuzzy, colored growth, green, blue, black, or pink) on the rind above the waterline is a concern: if the rind dries out above the liquid surface, it can mold. Keep rind submerged throughout fermentation. A small amount of white bloom on submerged rind is usually Kahm yeast (harmless), but green or colored mold on exposed rind means the batch should be discarded.
Can I do a second fermentation to add carbonation?
Yes, tepache makes an excellent base for F2 bottle carbonation. After straining, bottle the tepache in swing-top or pressure-safe bottles and leave at room temperature for 12–24 hours (it ferments much faster than kombucha because more wild yeast is active). Refrigerate when carbonated. Use plastic bottles as a pressure gauge, when the plastic firms noticeably, the tepache is carbonated. Open over a sink and release pressure gradually. The F2 makes tepache sparkle beautifully and slightly dries the sweetness, improving the overall balance.