Pineapple skins are surprisingly useful. You can ferment them into drinks, simmer them into syrups, turn them into homemade vinegar, or toss them in the compost. The skins contain nearly as much bromelain (a protein-digesting enzyme with anti-inflammatory properties) as the flesh itself, so several of these uses carry genuine nutritional benefits beyond just reducing waste.
Make Tepache, a Naturally Fermented Soda
Tepache is a traditional Mexican fermented drink made almost entirely from pineapple scraps. It tastes like a lightly fizzy, sweet-tart pineapple soda with warm spice notes, and it requires almost no effort to make. Combine the skins and cores from two ripe pineapples (about 28 ounces total) with roughly one pound of piloncillo or brown sugar, two cinnamon sticks, and 10 cups of filtered water in a large glass jar or nonreactive pot. Fresh ginger and whole cloves are common additions.
Cover the vessel with a cloth secured by a rubber band, and stir once a day. In warm conditions (77°F to 86°F), you’ll see a thin layer of frothy white bubbles form on the surface and hear faint fizzing within about three days. In cooler kitchens, fermentation can take five to ten days. If no bubbles appear by day five, move the container somewhere warmer and keep stirring daily. Once it’s bubbly and tastes pleasantly tangy, strain out the solids and refrigerate. The result is a probiotic-rich, mildly alcoholic drink you can sip straight or mix into cocktails.
Brew Pineapple Skin Tea or Syrup
For something faster than fermentation, simmer the skins into a fragrant tea or simple syrup. Cut the rinds and core from one pineapple into chunks and place them in a pot with four to five cups of water, half a cup of sugar, a cinnamon stick, and a small piece of fresh ginger. Bring to a boil, then reduce the heat and simmer for about 15 minutes. Strain, pour into a jar, and refrigerate.
With the sugar, this makes a pineapple-spice syrup that works beautifully in cocktails, iced tea, or drizzled over pancakes. Without the sugar, you get a light, aromatic tea. The skins release a surprising amount of flavor and sweetness during simmering, along with bromelain. Research shows pineapple peel contains bromelain at concentrations nearly identical to the flesh (4.52 units per milliliter compared to 4.71 in the fruit), so your tea carries some of the same enzyme activity linked to reduced inflammation and pain signaling.
Ferment Homemade Pineapple Vinegar
Pineapple vinegar takes longer than tepache but requires even less attention. Cut the peel and core from one whole pineapple into chunks, place them in a clean glass jar, and dissolve one cup of brown sugar into four cups of water. Pour the sugar water over the scraps, cover with a cloth or paper towel secured by a rubber band (air needs to reach the liquid), and store in a cool, dark place.
Stir every few days to prevent mold from forming on the surface. Around week three, taste it. The liquid should be tangy and sour with a hint of pineapple. If you want a stronger vinegar flavor, let it sit another week and taste again. Eventually, a gelatinous disc called “the mother” will form on top. That’s a sign of healthy acetic acid fermentation, not contamination. Once the flavor is where you want it, strain out the solids, cap the jar tightly, and store in a cool, dry place. It keeps for up to a year and works well in salad dressings, marinades, and as a tangy cooking acid similar to apple cider vinegar.
Use Them as a Stovetop Air Freshener
Pineapple skins make excellent stovetop potpourri. Place the skins in a pot with orange peels, a cinnamon stick, star anise, and a splash of vanilla extract. Fill the pot about halfway with water, set it on a burner at low heat, and let it simmer. The tropical, spiced scent fills a room within minutes. Top off the water as it evaporates and never let the pot run dry. You can keep this going for hours, and the same batch of skins can be refrigerated and reheated for a second or third use before the scent fades.
Compost Them (With a Few Adjustments)
Pineapple skins are compostable, but they break down slowly compared to most fruit scraps. Their fibrous texture and natural acidity (pineapple processing waste has a pH around 4.8) mean they resist decomposition. In a standard compost pile, pineapple residues take roughly four months to fully break down and reach stable compost temperature.
To speed things up, chop the skins into small pieces before adding them. Mix them thoroughly with nitrogen-rich materials like grass clippings, coffee grounds, or kitchen scraps to offset their high carbon-to-nitrogen ratio. If you’re composting large quantities, the acidity can temporarily lower your pile’s pH, so balancing with something alkaline or neutral (like crushed eggshells or a handful of garden lime) helps keep the microbial activity humming. In small amounts from a single pineapple, the acidity is unlikely to cause problems in an established pile.
Quick Comparison of Your Options
- Tepache: 3 to 10 days, minimal effort, produces a probiotic fizzy drink
- Tea or syrup: 15 minutes on the stove, ready immediately
- Vinegar: 3 to 4 weeks of passive fermentation, keeps up to a year
- Air freshener: Immediate, lasts several hours per session
- Compost: About 4 months to full decomposition, chop small for best results
If you’re not ready to use the skins right away, freeze them in a zip-top bag. They’ll keep for months, and you can accumulate scraps from multiple pineapples before starting a batch of tepache or vinegar.