Tahini in Gelato: Sesame Paste Fat, Flavour & Balance
Table of contents
Tahini behaves like no other paste in a gelato mix. Its fat is liquid at every temperature you will ever serve, it carries almost no water, and it contributes nothing to MSNF. Balance it like a nut paste and the result is oily, flat and stubbornly soft.
Hulled sesame paste: roughly 54 percent liquid fat and almost no water.
What tahini actually puts into a mix
Tahini is ground hulled sesame seed and nothing else. There is no added sugar, no added water and no dairy, which makes it one of the most concentrated solids sources on the bench. The figures below are for plain sesame butter as published by the USDA FoodData Central reference entry for tahini.
| Per 100 g tahini | Amount |
|---|---|
| Water | 3.1 g |
| Total fat | 53.8 g |
| Protein | 17.0 g |
| Carbohydrate | 21.2 g |
| of which fibre | 9.3 g |
| of which sugars | 0.5 g |
| Total solids | ~96.9 g |
Two numbers drive every decision that follows. The first is 53.8 g of fat, which means an 8 percent dose adds 4.3 points of fat to the mix on its own. The second is 0.5 g of sugar, which means tahini adds almost no anti-freezing power at all. Everything it brings lands in the other solids bucket, never in MSNF, because there is no milk in it.
The fat that never crystallises
This is where tahini parts company with the pastes most gelatieri already know. Sesame oil is dominated by oleic and linoleic acid, at roughly 40 and 43 percent of total fatty acids, with palmitic acid near 9 percent and stearic acid near 5 percent. Around 85 percent of the fat is unsaturated, and its melting range sits far below anything a display case will ever reach.
The practical consequence is blunt. Milk fat is partly crystalline at serving temperature and those crystals reinforce the fat globule network that gives gelato its short, clean body. Cocoa butter is more extreme still, sharply solid and then sharply molten. Sesame oil is neither. It coats the palate beautifully and contributes nothing structural, so a mix that reads correctly on the spreadsheet can still collapse in the pozzetto.
Quick reference. Tahini is roughly 54 percent fat and that fat stays liquid at serving temperature. It buys mouthfeel, not structure. Swap it against dairy fat one point for one point and rebuild body with MSNF or stabiliser, never with more paste.
Figure 1 — Tahini sits between pistachio and hazelnut paste on fat, but its fat is the only one of the three that is liquid throughout the freezing curve.
Dosing and rebalancing
A working range is 60 to 100 g of tahini per kilo of mix. Below 60 g the sesame reads as a background note; above 100 g bitterness and oiliness arrive together. Take 80 g/kg as the reference dose and the arithmetic is straightforward.
| Contribution at 80 g/kg | Points added to mix |
|---|---|
| Fat | 4.30 |
| Protein | 1.36 |
| Carbohydrate | 1.70 |
| of which fibre | 0.74 |
| Sugars | 0.04 |
| Total solids | 7.76 |
Now compare a plain white base against the same base rebuilt around that dose.
| Parameter | White base | Tahini base at 80 g/kg |
|---|---|---|
| Total fat | 8.0 % | 8.0 % (3.7 dairy + 4.3 sesame) |
| MSNF | 10.5 % | 9.0 % |
| Sugars | 18.0 % | 17.0 % |
| Other solids | 0.5 % | 4.0 % |
| Total solids | 37.0 % | 38.0 % |
Three moves make that table work. Cut cream hard, because the sesame has already paid the fat bill. Hold sugars at or slightly below your usual figure, since tahini adds solids without adding PAC and the mix will otherwise freeze harder than the numbers suggest. And accept a lower MSNF, because total solids are already climbing and pushing both is how you get a pasty, gummy body. If you are building this from scratch rather than adapting, work through how to balance a gelato recipe first and treat tahini as a fat source with a solids tail.
Roast, bitterness and the flavour ceiling
Buy hulled tahini. The hull carries most of the bitterness and astringency, and unhulled paste that tastes acceptable straight from the jar will taste harsh once cold blunts the sweetness carrying it. Sesame also contains the lignans sesamin and sesamolin, which are part of its characteristic finish and do not disappear with dilution.
Roast level is the other lever. A darker roast brings Maillard depth and reads as nuttier, but bitterness climbs faster with dose than sweetness impression does, which is why the practical ceiling sits near 10 percent rather than the 15 to 20 percent you might use with pistachio paste. Half a percent of salt sharpens the whole thing considerably; see salt in gelato for why that works.
Sesame is a declared allergen
This matters more than the recipe. In the European Union, sesame seeds and products thereof appear in Annex II of Regulation (EU) No 1169/2011, the list of substances that must always be declared. In the United States, the FASTER Act of 2021 added sesame as the ninth major food allergen, with the requirement taking effect on 1 January 2023.
Tahini is a genuinely useful answer for customers avoiding tree nuts, and it is a genuine hazard for everyone else. Give it a dedicated scoop and its own spatula, and put the declaration on the tub label rather than on a card that gets moved. The workflow in allergen labeling for gelato is worth reading before the flavour goes into the case.
Troubleshooting a tahini base
| Symptom | Likely cause | Fix |
|---|---|---|
| Oily film on the palate | Liquid fat with no emulsifier to hold it | Add 0.3 % mono- and diglycerides and homogenise warm |
| Too soft in the case | Fat contributes no crystal network | Lower sugar PAC 1 to 2 points; see why gelato is too soft |
| Bitter, drying finish | Unhulled or over-roasted paste | Switch to light hulled tahini, drop dose to 60 g/kg |
| Sandy or gritty texture | Separated oil, paste added cold | Stir the jar to uniformity, disperse above 40 °C; see sandy gelato texture |
Always stir the jar before weighing. Tahini separates hard in storage, and a scoop taken from the top is mostly oil while a scoop from the bottom is mostly solids. Two batches weighed from the same jar on the same day can differ by several points of fat if nobody homogenises it first.
Related Concepts
- Black sesame gelato recipe — the same seed, unhulled, in a finished formula
- Starch vs fat in nut pastes — why pastes behave differently from their fat number
- Ideal fat percentage in gelato — the target you are rebalancing against
- Vegan gelato fat sources — where tahini sits among plant fats
