Green plums are one of the most versatile underripe fruits you can work with. Whether you picked them from a backyard tree, found them at a Middle Eastern grocery, or stumbled on a bag at a farmers market, you have options ranging from eating them raw with a pinch of salt to slow-curing them like olives over several months. The tart, citric-acid-heavy flavor of unripe plums sits somewhere between a green apple and a lemon, and that sourness is exactly what makes them useful in the kitchen.
Eat Them Raw With Salt
The simplest thing you can do with green plums is eat them fresh. In Iran, green plums (called gojeh sabz) are a beloved seasonal snack sold in heaping piles at roadside stands and markets. The traditional method is straightforward: sprinkle coarse salt over the plums or dip them directly into a small dish of salt before each bite. The salt tempers the sourness and brings out a refreshing, almost tropical tartness. Chile powder is another popular addition, and in parts of Southeast Asia, unripe plums get dipped in shrimp paste for a savory-sour combination.
Children especially love them for the pucker-inducing tang. If you find the sourness too intense on its own, salt really does transform the experience. Think of it the same way you’d salt a slice of underripe mango. These plums also work as an after-dinner palate cleanser, which is how many Persian families serve them.
Cook Them Into a Sour Herb Stew
One of the best savory uses for green plums is khoresht gojeh sabz, a Persian stew built around their tartness. The base is simple: cubed lamb or beef browned and simmered until tender, then finished with roughly two cups each of fresh parsley and mint along with a generous handful of halved green plums. The plums soften into the broth during the last 30 to 45 minutes of cooking, releasing their acid into the sauce and creating a bright, herbal flavor that cuts through the richness of the meat.
The same principle works outside of Persian cooking. Any braise or stew that benefits from acidity can use green plums the way you’d use a squeeze of lemon or a splash of vinegar. Toss them into a tagine, add them to a slow-cooked chicken dish, or simmer them alongside pork shoulder. They hold their shape better than you’d expect and add both flavor and a slight body to sauces as their pectin breaks down.
Pickle Them Like Olives
Green plums can be cured and pickled into something remarkably similar to green olives. The process takes time, about three months total for the brine cure, but requires almost no hands-on work.
Start by dissolving 12 grams of coarse sea salt into 250 milliliters of water. Pack about 20 green plums into a sterilized jar, cover them with the brine, and store the jar in a cool, dark place for one week. After that first week, drain the old brine, make a fresh batch at the same ratio, sterilize the jar again, and return the plums. Repeat this process once more after a month. Altogether, the plums sit in brine for three months, with fresh brine at each stage to prevent off flavors from developing.
Once cured, drain the plums and transfer them to a pickling liquid: 250 milliliters of apple cider vinegar, a teaspoon of sea salt, a tablespoon of sugar, six black peppercorns, a bay leaf, and a sprig of rosemary. Let them soak for 24 hours, then move everything into a clean jar covered in olive oil or the pickling liquid itself. After three more weeks of marinating, the pickled plums are ready. They’re firm, briny, and tangy, perfect on a cheese board or alongside cured meats.
Make Japanese-Style Umeboshi
If you want a more intensely flavored preserved plum, the Japanese method for making umeboshi uses green, firm plums as the starting point. The traditional ratio is 20% salt by weight of the plums, which is significantly saltier than the olive-style cure but is what gives umeboshi their characteristic punch.
Pack the salted plums into a container and wait about a week for them to release their liquid, called umezu. Next, add red shiso leaves (available at Japanese grocery stores) and let everything sit together for roughly two weeks. The shiso dyes the plums a deep reddish-pink and adds a minty, slightly medicinal flavor. The final step is sun-drying the plums for three consecutive days during hot, dry weather, turning them periodically so every side gets direct sunlight. After drying, the plums go back into their container to mature. The result is intensely salty, sour, and savory. A single umeboshi tucked into a bowl of rice is a staple of Japanese home cooking.
Let Them Ripen at Home
If you’d rather just have sweet, ripe plums, you can ripen green ones on the counter. Place them in a brown paper bag with a few holes poked in it. Adding a ripe apple to the bag speeds things up because apples release ethylene gas, which triggers ripening in stone fruit. Check daily. Most plums will soften and develop sweetness within three to five days depending on how unripe they were to start. Once they give slightly to gentle pressure and smell fragrant, move them to the refrigerator and use within a few days.
Jams, Syrups, and Drinks
The high acidity and natural pectin in green plums make them excellent for jam. Because they’re so tart, you can use a higher ratio of sugar than you would with ripe fruit, somewhere around equal parts by weight, and still end up with a jam that tastes balanced rather than cloying. The pectin content means green plum jam sets firmly without needing added pectin in most cases.
For a quicker project, simmer halved green plums with sugar and water into a simple syrup. Strain out the solids and you have a tart, floral syrup that works in cocktails, sparkling water, or drizzled over yogurt and ice cream. A ratio of roughly equal parts plums, sugar, and water simmered for 20 minutes gives you a concentrated base you can dilute to taste.
In Turkey and across the Caucasus, sour green plum juice is a common cooking ingredient used the way Western cooks reach for lemon juice or vinegar. You can make your own by blending green plums with a little water and straining. Stored in the refrigerator, it keeps for a couple of weeks and adds bright acidity to salad dressings, marinades, and grain bowls.
A Few Things to Keep in Mind
Green plums are high in citric acid and tannins, which is what gives them that dry, mouth-puckering quality. Eating a few as a snack is fine, but consuming large quantities on an empty stomach can cause gas, stomach cramps, or diarrhea. Start with a handful and see how your body reacts. The flesh is a good source of potassium, calcium, magnesium, and several trace minerals including zinc and selenium, so they’re nutritionally worthwhile even in their unripe state.
Greengages, the most widely known European variety, are typically 2 to 4 centimeters in diameter with smooth, pale green to yellowish skin and sometimes a faint blue blush. They’re grown across the UK, France, Germany, and parts of the United States under names like Cambridge Gage, Denniston’s Superb, and Reine Claude Verte. If your green plums are a named greengage variety and already slightly soft, they may actually be ripe. Greengages stay green even when fully sweet, so taste one before deciding they need salt or sugar.