Total Solids in Gelato Explained — The 36–42% Target
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Total Solids (often abbreviated TS or ST) is the sum of all non-water content in a gelato recipe — sugars, milk solids, fat, stabilizers, flavorings. Target range for professional gelato: 36–42%. Total Solids tells you how much of your mix is actually "stuff" versus water — and managing it correctly is the difference between smooth, dense gelato and an icy or heavy-bodied product.
What Counts as Total Solids
Figure 1 — total solids breakdown..
Everything in your recipe that is not water counts as a solid. The major contributors:
| Component | Typical contribution to TS |
|---|---|
| Sugars (sucrose, dextrose, etc.) | 16–22% of mix |
| Milk solids non-fat (MSNF) | 8–12% of mix |
| Fat | 6–9% of mix |
| Stabilizers + emulsifiers | 0.3–0.6% of mix |
| Flavorings (paste, cocoa) | 5–10% of mix |
| Total Solids | 36–42% of mix |
Water makes up the remaining 58–64% of the mix. The math is simple: if you put 1000 g of mix into the freezer and it ends up with 380 g of solids, your TS is 38%.
Why Total Solids Matters
Total Solids drives texture in two ways:
Less free water = less ice. Higher TS means less water in the mix, and less water means smaller and fewer ice crystals when frozen. Smooth texture.
More body = denser mouthfeel. Higher TS gives the mix more viscosity and more "stuff" the tongue can perceive. Heavier, creamier mouthfeel.
But you cannot just push TS up forever. Above 44% the product becomes dense, gummy, slow-melting in the mouth, and the flavor release suffers — there is so much non-water that aromatic molecules take longer to reach the palate. Below 35% there is too much free water to bind, even with stabilizers, and ice crystals form.
Quick reference. Gelato: TS 36–42%. Sorbetto: TS 28–36% (lower because there is no fat or MSNF). Stay in range or texture suffers in one direction or the other.
How to Calculate Total Solids
Add up the solids contribution of each ingredient (weight × dry matter percentage), then divide by total mix weight.
| Ingredient | TS % | Note |
|---|---|---|
| Whole milk | 12.5% | varies 12.0–13.0% |
| Heavy cream (35% fat) | 40% | fat + MSNF |
| Sucrose | 100% | pure solid |
| Dextrose anhydrous | 100% | pure solid |
| Skim milk powder | 97% | low moisture |
| Egg yolks | 50% | fat + protein + lecithin |
| Stabilizer/emulsifier blend | 100% | dry powder |
| Pistachio paste 100% | 95–98% | depending on supplier |
| Cocoa powder | 95% | low moisture |
| Inulin | 95% | mostly fiber |
Sum across all ingredients in 1000 g of mix and divide by 10 to get TS as percent.
For production, use the Total Solids Calculator — it handles ingredient TS values automatically.
How to Measure Total Solids with a Refractometer
A handheld digital refractometer (also called a Brix refractometer) measures dissolved solids in a liquid by refracting light through it. Place a drop of your mix on the prism, close the cover, read the percentage.
The refractometer reading gives you Brix (% sugar by weight equivalent), which is close but not identical to TS for a gelato mix — it slightly under-reads because milk proteins and stabilizers refract light differently than sugar. For sorbets (mostly sugar + water + fruit), Brix and TS are essentially the same.
A €100–€300 refractometer pays for itself in the first month of production by catching out-of-range mixes before churning.
How to Adjust Total Solids
TS too low: add SMP (raises both TS and MSNF), inulin (raises TS without sweetness), or maltodextrin (raises TS with minimal PAC impact). Each percentage point added to mix weight raises TS by roughly the same amount.
TS too high: dilute with water (lowers TS but also dilutes everything else — recalculate PAC, POD, MSNF after). Or reduce SMP / inulin. Be careful: cutting fat or sugars to lower TS will also break PAC and POD targets.
Related Concepts
- PAC (anti-freezing power)
- POD (sweetness power)
- MSNF (Milk Solids Non-Fat)
- Overrun
- Refractometer, fat in gelato
- Complete professional gelato guide
Hit your Total Solids target. Open the Free Gelato Balancing App, paste your recipe, and verify TS in real time. Free, web-based, no install.
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