Recipes for tahini biscuits generally present tahini as a flavouring. Yet it also changes the structure of the dough.
What is tahini made of?
Tahini is made by grinding toasted sesame and contains nothing else.
It carries 55 to 60 grams of fat per hundred grams.
Most of that fat is mono- and polyunsaturated, dominated by oleic and linoleic acid.
Protein is 17 grams, high compared with nut butters.
Carbohydrate is 21 grams, of which 9 grams is fibre.
It is rich in calcium: over 400 milligrams per hundred grams.
That composition makes tahini both a fat and a protein source.
Those two components do separate jobs in a dough.
Can it replace butter?
Partly, and with important differences.
Butter is 80 to 82 percent fat; tahini 55 to 60.
More tahini is therefore needed for the same fat effect.
Butter is solid at room temperature; tahini is fluid.
That difference changes how the dough behaves.
Solid fat stays as separate particles between the flour grains and leaves pores as it melts during baking.
Fluid fat spreads fully through the flour; no pores form and the texture comes out denser.
A biscuit made with tahini alone is therefore firmer and less layered.
A blend gives the best result: part of the fat as butter, part as tahini.
| Component | Fat | Effect on texture | Aroma |
|---|---|---|---|
| Butter | 80-82% | Porous, layered | Milky, browned |
| Tahini | 55-60% | Dense, crumbly | Sesame, faintly astringent |
| Oil | 100% | Dense, moist | Neutral |
| Clarified butter | 99% | Sandy | Intense butter |
| Blend (half and half) | 68-70% | Balanced | Layered |
How does it block gluten?
Tahini blocks gluten formation two ways.
The first is fat. Fat coats the flour particles and makes it harder for water to reach the protein.
That mechanism is common to all fats.
The second is tahini's own protein and fibre content.
Sesame protein forms no gluten; it acts as a diluent in the dough.
The fibre binds water too and reduces what reaches the gluten.
That second mechanism does not exist in butter.
The result: at the same fat level, tahini dough develops less gluten than butter dough.
The biscuit comes out crumblier and shorter in texture.
That is a wanted property in a biscuit; it would not be in bread.
How does the aroma develop?
Tahini's aroma comes from toasted sesame.
The Maillard reaction runs during toasting and pyrazine compounds form.
Those compounds develop once more as the biscuit bakes.
The result is a doubly toasted aroma.
The degree of toasting in the tahini affects the result too.
Tahini made from lightly toasted sesame is more neutral and paler.
Darkly toasted tahini gives a more intense aroma but carries a risk of bitterness.
A medium toast is preferable for biscuits.
Tahini also agrees with grape molasses and chocolate; all three carry shared roast notes.
What ratio of tahini should be used?
The quantity of tahini directly determines the structure of the dough.
150 to 250 grams per kilogram of flour is the suitable range.
At that level tahini contributes aroma and shifts the texture slightly.
Above 250 grams the dough becomes heavy and the biscuit hardens.
Above 400 grams the dough cannot bind and falls apart.
Butter should be reduced when tahini goes in; 60 to 70 grams of butter comes off for every 100 grams of tahini.
Without that calculation the total fat rises and the biscuits spread during baking.
Sugar deserves review too; tahini is faintly astringent and sugar balances that.
Tahini recipes generally carry a slightly higher sugar level.
How is the bitterness managed?
Tahini carries a mild astringent note that comes forward in some products.
Its source is compounds in the sesame husk.
Tahini made from hulled sesame is markedly less astringent.
That tahini is paler and more expensive.
The second source is how long the tahini has stood.
Opened tahini left a long time turns bitter as its fat oxidises.
That bitterness is irreversible and passes into the whole product.
Fresh tahini should be used and an opened jar kept in the fridge.
The third factor is baking. Over-baked tahini biscuits turn bitter; tahini is more heat-sensitive than butter.
The temperature should stay at 160 to 170 degrees.
How does tahini dough behave in frozen production?
Tahini dough suits frozen production.
Because the fat content is high, little water crystallisation occurs during freezing.
That preserves the texture.
Freezing it as raw dough is preferred; shaped biscuits are frozen on a tray and then bagged.
They bake straight from frozen, needing three to five minutes more than usual.
The shelf life is three months; beyond that the fat in the tahini begins oxidising.
Baked product can be frozen too, but that is riskier with tahini biscuits.
Fat can seep to the surface during thawing.
Airtight packaging and rapid thawing reduce that risk.
Baked tahini biscuits keep two weeks in an airtight container at room temperature, slightly less than plain biscuits.
How is baking time set for tahini doughs?
Tahini is a fatty component and it changes how the dough bakes.
Fat conducts heat quickly.
That browns the outer surface of the biscuit sooner.
Adding tahini to a standard recipe shortens the baking time by two or three minutes.
The temperature can drop ten degrees too.
Otherwise the surface darkens and the slightly bitter note of tahini comes forward.
A biscuit is still soft when it leaves the oven.
It rests five minutes on the tray before moving to a wire rack.
That time lets the fat in the tahini set again and the structure settle.
Biscuits moved early fall apart.
The colour should be checked as well; where the edges are golden and the centre still looks pale, it has come out at the right moment.
The tray should also be turned once during baking, since ovens rarely heat evenly across their width.
