
This vibrant Sumac Onions recipe transforms ordinary red onions into a flavor-packed Turkish onion salad that brightens any meal. The simple combination of thinly sliced onions, tangy sumac, and a few fresh ingredients creates a versatile condiment that adds both color and complexity to countless dishes.
I discovered this traditional Turkish onion salad during my travels through Istanbul and was amazed how something so simple could deliver such impactful flavor. When I serve these sumac onions at gatherings, guests always ask for the recipe.
Ingredients
- Red onion: Sliced thin for quick marination and perfect texture
- Sumac: The star ingredient providing citrusy tartness without acidity
- Salt: Helps draw moisture from onions and balances flavors
- Red wine vinegar or lemon juice: Adds brightness and begins pickling process
- Extra virgin olive oil: Brings richness and helps carry flavors
- Fresh parsley: Adds color contrast and herbaceous notes
Step-by-Step Instructions
- Prepare the onions:
- Thinly slice one large red onion into half moons or rings depending on your preference. The thinner the slices, the more quickly they will soften and absorb the sumac flavor. Aim for slices about 1/8 inch thick for the best texture.
- Massage with sumac and salt:
- Place sliced onions in a medium bowl and sprinkle with 2 teaspoons sumac and 1/2 teaspoon salt. Use your hands to gently massage the ingredients together for 30-60 seconds. This crucial step helps break down the onions slightly and allows the sumac to penetrate more effectively.
- Add remaining ingredients:
- Pour in 1 tablespoon each of red wine vinegar or lemon juice and extra virgin olive oil. Add 1 tablespoon of freshly chopped parsley. Gently toss everything together until the onions are evenly coated with all ingredients.
- Marinate:
- Cover the bowl and let the onions marinate at room temperature for at least 20 minutes. This resting period allows the flavors to meld and the onions to soften slightly while maintaining their pleasant crunch.

Sumac is the unsung hero of this dish. Its deep burgundy color and lemony tartness transforms ordinary onions into something extraordinary. I keep a jar of sumac in my spice cabinet specifically for making this recipe when unexpected guests arrive. The vibrant color always makes a simple spread look more impressive.
The Magic of Sumac
Sumac is a crimson-colored spice made from ground berries of the sumac bush, popular throughout Mediterranean and Middle Eastern cuisine. It has a tangy, lemony flavor that brightens dishes without adding acidity. If you are new to sumac, this onion salad is the perfect introduction. Beyond this recipe, try sprinkling sumac on eggs, hummus, roasted vegetables, or grilled meats for an instant flavor boost.
Serving Suggestions
These sumac onions shine as a topping for grilled meats, especially lamb and beef. They make an outstanding addition to kebabs, gyros, or shawarma wraps. Try adding them to grain bowls with bulgur or rice for a burst of flavor. They also work beautifully alongside creamy dips like hummus or baba ganoush, cutting through richness with their bright tanginess. For a simple mezze platter, serve sumac onions with olives, feta cheese, and warm pita bread.
Make It Your Own
The beauty of this recipe lies in its adaptability. For a sweeter variation, add a teaspoon of pomegranate molasses. If you enjoy heat, incorporate a pinch of Aleppo pepper or red pepper flakes. For a more substantial salad, mix in diced cucumbers and tomatoes. You can also experiment with different herbs like mint or cilantro in place of or alongside the parsley.

Serve these sumac onions with all your favorite dishes to instantly elevate your meals!
Frequently Asked Questions
- → What is sumac and where can I find it?
Sumac is a deep red spice with a tangy, lemony flavor common in Middle Eastern cooking. You can find sumac in most specialty food stores, international markets, or the international aisle of well-stocked supermarkets. It's also readily available online.
- → Can I substitute the sumac with another spice?
While sumac's flavor is unique, you can substitute with a combination of lemon zest and paprika in a pinch. However, authentic Turkish onion salad truly benefits from sumac's distinctive tangy profile.
- → How long should I marinate the onions for best flavor?
The onions need at least 20 minutes to marinate and soften, but they develop even better flavor after 1-2 hours. They'll keep well in the refrigerator for up to 4 days, improving in flavor over time.
- → Will massaging the onions make them less sharp?
Yes! Massaging the onions with sumac and salt helps break down their structure, reducing the sharpness and raw flavor while helping them absorb the marinade better.
- → What dishes pair well with sumac onions?
Sumac onions pair beautifully with grilled meats, kebabs, and falafel. They're excellent in pita sandwiches, on burgers, mixed into salads, or as a side for Mediterranean rice dishes. They also complement rich foods by adding brightness and acidity.
- → Can I use white or yellow onions instead of red?
Red onions are traditional for their color and milder flavor, but you can substitute white or yellow onions. The flavor profile will be slightly different, and you'll lose the vibrant purple-pink color that makes this dish visually appealing.