Sumac is a tangy, deep-red spice made from the dried and ground berries of the Rhus coriaria plant. It tastes tart and slightly fruity, similar to a squeeze of lemon, and has been a staple seasoning across Middle Eastern, Mediterranean, and Central Asian cooking for centuries. If you’ve ever had za’atar sprinkled on flatbread or a bright-red dusting on hummus, you’ve likely already tasted sumac.
Where Sumac Comes From
The sumac plant grows natively across a wide band stretching from the Canary Islands and the Mediterranean coast all the way to Afghanistan. Turkey, Iran, and the Levant region (Lebanon, Syria, Palestine) are the primary sources for culinary sumac today. The plant produces clusters of small, fuzzy red berries that are harvested, dried, and ground into a coarse powder. You’ll find it sold in Middle Eastern grocery stores and increasingly in the spice aisle of mainstream supermarkets.
What It Tastes Like and Why
Sumac’s signature sourness comes from malic acid, the same organic acid that gives green apples their tartness. The berries also contain citric acid, tartaric acid, and fumaric acid, all contributing to a layered, fruity acidity that’s more complex than plain lemon juice. Beyond the sourness, volatile compounds in the berries add a subtle woody, almost floral depth to the flavor.
This combination makes sumac remarkably versatile. It delivers brightness to dishes without adding liquid, which is why cooks reach for it when they want acidity in a dry rub, a finishing sprinkle, or a marinade where lemon juice would thin things out too much.
How It’s Used in Cooking
Sumac is one of the core ingredients in za’atar, the iconic Middle Eastern spice blend that also includes dried thyme, marjoram, sesame seeds, and salt. Za’atar gets spread on flatbread (especially Lebanese manakish), mixed into olive oil as a dip, and sprinkled over roasted vegetables.
On its own, sumac works in more places than most people expect. It’s a natural fit anywhere you’d squeeze lemon: over grilled chicken or lamb kebabs, tossed into grain salads, whisked into vinaigrettes, or dusted on roasted eggplant. It’s the traditional finishing touch on fattoush, a Levantine bread salad, and it’s frequently sprinkled over hummus and baba ganoush as a final garnish. You can also stir it into yogurt-based sauces or use it as a dry rub for meat alongside salt, garlic, and cumin.
A tablespoon is a typical amount for marinating a whole chicken. For finishing dishes, a generous pinch or two is usually enough to add that characteristic tang.
Nutritional Profile
Since sumac is used in small quantities, it won’t dramatically change the nutritional math of a meal. Per ounce (about 28 grams), ground sumac has roughly 10 grams of net carbohydrates, 2.6 grams of fat, and nearly 10 grams of fiber. It’s notably high in sodium for a spice, at around 774 mg per ounce, so if you’re watching salt intake, factor that in when seasoning.
Where sumac stands out nutritionally is its polyphenol content. The berries are packed with plant-based antioxidants. This high polyphenol concentration is what has drawn researchers to study sumac’s potential health effects.
Potential Health Benefits
Small clinical trials have explored sumac’s effects on blood sugar and inflammation, with some promising early results. In one study of people with type 2 diabetes, daily sumac supplementation led to significant decreases in both fasting blood sugar and HbA1c, a marker of long-term blood sugar control. The same study found improvements in total antioxidant capacity.
Other trials in adults with metabolic syndrome have found that sumac supplementation was associated with reductions in insulin resistance and high-sensitivity C-reactive protein, a key marker of inflammation in the body. These findings are interesting but come from small studies, so they’re far from settled science. Still, as a spice that can replace less healthy seasonings like excess salt or sugar-laden sauces, sumac is a smart addition to your kitchen on flavor alone.
Sumac vs. Poison Sumac
This is a common source of confusion, but the two plants are easy to tell apart. Culinary sumac (Rhus species) produces dense, upright clusters of fuzzy red berries. Poison sumac (Toxicodendron vernix) is a completely different plant that produces loose, drooping clusters of creamy white berries and grows in swampy areas of eastern North America. If the berries are red and clustered upward, it’s the edible kind. If they’re white and hanging down, stay away. Any sumac you buy from a grocery store or spice vendor is the culinary variety.
Allergy Considerations
Sumac belongs to the Anacardiaceae family, which also includes cashews, pistachios, mangoes, and pink peppercorn. Research has documented cases of cashew-allergic individuals experiencing allergic reactions after eating sumac, and lab testing of children with cashew nut allergies has confirmed cross-sensitization to sumac in some cases. If you have a known cashew or pistachio allergy, it’s worth being cautious with sumac and discussing it with an allergist before trying it.
How to Store It
Like most ground spices, sumac loses its punch over time. For the best flavor, replace opened ground sumac after about six months. Store it in its original container or an airtight food-grade jar, kept in a cool, dry, dark spot. Avoid the countertop near the stove, and definitely avoid direct sunlight, both of which accelerate the loss of color and flavor. If you want to stretch its life further, you can store it in the freezer (not the refrigerator, where moisture will cause clumping). Whole dried sumac berries, if you can find them, will hold their flavor considerably longer than pre-ground powder.