Tahini has an ingredient list one line long: sesame. Even so, the products on a shelf differ considerably.
How does tahini get made?
The sesame gets washed and hulled.
Roasting follows, at a hundred and forty to a hundred and sixty degrees.
The roasted seed goes through a stone mill.
Milling releases the oil in the sesame and the mixture turns fluid.
Nothing else goes in; pure tahini contains no water, no added oil, no sugar and no emulsifier.
| Measure | Pure tahini | Tahini with additives |
|---|---|---|
| Ingredients | Sesame only | Sesame plus oil or sugar |
| Oil separation | Present | Absent or minimal |
| Colour | Pale beige to cream | Whitish or dark |
| Mouthfeel | Dense, coating | Light, slippery |
| Bottom of the jar | Firm sediment | Soft |
Why is oil separation a good sign?
Tahini is not an emulsion; it is a mixture of solid sesame particles and liquid oil.
That mixture is not stable. Given time the oil moves to the top while the solid part sinks.
The separation shows no emulsifier went in.
A tahini that does not separate either contains an emulsifier or some other additive holding the structure.
So the layer of oil on top is a sign of purity rather than a fault.
What does the colour tell you?
Pure tahini gives a colour between pale beige and cream.
A very white product may have been over-hulled or may contain milk powder.
A very dark product points to over-roasted sesame, which raises the bitterness.
Tahini made from unhulled sesame is naturally darker and more bitter; it sells as a separate product and the label says so.
Colour alone is not enough, but alongside the other tests it means something.
How does the taste get judged?
Pure tahini carries a slight bitterness; that is normal and belongs to the sesame.
The bitterness should not dominate; a lasting burn in the mouth indicates over-roasting.
If you taste sweetness, sugar went in; pure tahini is not sweet.
There should be a sense of richness without a slippery film in the mouth; slipperiness points to added vegetable oil.
The sesame aroma should be clear; a neutral taste says the product was diluted.
How does the consistency test work?
After stirring, a spoonful comes out of the jar.
It should run off the spoon slowly and without breaking.
Tahini that runs too fast contains too much oil.
Tahini that will not flow at all, at a paste consistency, either used low-oil sesame or carries added starch.
Look at whether the back of the spoon stays coated; pure tahini leaves a thin film.
What does the water test show?
A teaspoon of tahini goes into a glass of water and gets stirred.
Pure tahini disperses and produces a milky cloudiness.
That comes from the interaction of sesame protein with water.
In a product carrying starch the mixture thickens and takes on a gel-like consistency.
The test is not conclusive, but a clear deviation shows.
What does the sediment at the bottom mean?
Tahini that has stood a long time develops a firm layer at the bottom.
That layer is settled sesame solids.
Stirred, it disperses again; that is normal.
Sediment that will not disperse and has gone hard shows the product stood far too long.
At that point the product is not spoiled, but it becomes difficult to use.
How does it get stirred?
The jar goes upside down for ten minutes before opening; the oil moves to the base.
A long-handled knife or spatula gets used; a spoon does not reach the bottom.
Stirring goes slowly, lifting from the bottom.
The first stir takes several minutes; later ones come easily.
Once stirred, tahini kept in the fridge separates more slowly.
What gets checked on a tahini label?
The ingredient list should be one line: sesame.
Where vegetable oil appears the product has been diluted.
Where sugar or glucose syrup appears the product is not tahini but a tahini-based mixture.
Emulsifiers such as lecithin or mono- and diglycerides go in to prevent separation.
Where the sesame content is below a hundred percent, that figure appears on the label.
Where does tahini get used?
At breakfast, mixed with molasses and spread on bread.
In sweets; it is the base of helva, tahinli çörek and tahini biscuits.
In salad dressings, thinned with lemon, garlic and water.
As a structural element in dips such as hummus and baba ganoush.
To thicken soups; a spoonful makes a clear difference in tarhana or lentil soup.
What nutritional picture does tahini give?
A hundred grams carries 590 to 650 kilocalories.
Fat runs 50 to 57 grams, mostly polyunsaturated and monounsaturated.
Protein comes to 17 to 20 grams, high among plant sources.
Calcium reaches 400 to 900 milligrams, approaching the upper figure in tahini made from unhulled sesame.
A tablespoon weighs about fifteen grams, so 90 to 100 kilocalories.
How does tahini get stored?
Unopened, a jar lasts eighteen months to two years in a cool, dark place.
Once opened it holds three months at room temperature and six in a fridge.
In the fridge it firms up; it comes to room temperature before use.
A clean, dry spoon goes into the jar; a drop of water starts mould.
Rancidity sets the real limit; with so much fat, light and heat accelerate it, so a dark jar gets chosen.
What separates hulled tahini from unhulled?
Hulled tahini gets milled after the outer coat of the sesame comes away.
Its colour is paler, its taste softer and its bitterness low.
Unhulled tahini is darker, more bitter and denser in aroma.
On calcium the unhulled version leads clearly; the sesame hull is rich in it.
The hulled type is the common one in Turkey; unhulled tahini sells mostly as a speciality.
How does tahini get thinned?
For dressings or hummus, tahini gets thinned with water.
When the first water goes in the tahini unexpectedly thickens; that is normal.
The reason is that the sesame particles absorb the water and the mixture temporarily seizes.
Keep adding water and the mixture loosens into a creamy consistency.
Cold water gets used; hot water splits the mixture. Lemon juice goes in at this stage and lightens the colour.
