Skim milk powder (SMP, latte in polvere magro) is dehydrated skim milk — about 97% solids, 50% lactose, 36% protein, 8% minerals. It is the single most effective ingredient for fixing icy gelato. Adding 5–8% SMP to a recipe lifts MSNF into the 8–12% target range almost instantly, binds free water with the proteins, and transforms the texture from icy to smooth in a single batch. Most home gelato problems are solved by adding SMP.
What Skim Milk Powder Is
SMP is what you get when you take skim milk (whole milk minus the fat) and remove the water — typically by spray-drying. The result is a fine white powder with about 3% residual moisture that reconstitutes instantly when added to a liquid mix.
Composition of typical SMP per 100 g:
| Component | Weight (g) |
|---|---|
| Lactose | 50 |
| Protein (casein + whey) | 36 |
| Minerals | 8 |
| Moisture | 3 |
| Other (residual fat, vitamins) | 3 |
That makes SMP 97% MSNF by weight — almost pure milk solids non-fat. Adding 1 g of SMP to a mix is functionally equivalent to adding ~12 g of fresh skim milk in MSNF terms (without the water).
Low-Heat vs High-Heat SMP
Two grades exist, distinguished by the temperature used during the spray-drying step:
| Grade | Drying temperature | Whey protein nitrogen index | Use case |
|---|---|---|---|
| Low-heat SMP | 70–75°C | High (≥6.0 mg/g) | Gelato, baking, chocolate — emulsifies well |
| Medium-heat SMP | 80–85°C | 4.6–6.0 mg/g | Mixed-use commercial |
| High-heat SMP | 88–92°C | <4.5 mg/g | Bread industry, animal feed |
For gelato, choose low-heat SMP when available. The undenatured whey proteins emulsify fat better and produce slightly smoother texture. Most SMP sold to consumer markets is medium-heat (cheaper, more shelf-stable) — works fine but slightly inferior to low-heat.
Quick reference. SMP: 97% MSNF, 50% lactose, 36% protein. Use 4–8% of mix weight to bring MSNF into the 8–12% target range. Choose low-heat grade for gelato when possible.
How Much SMP in a Recipe
In a typical 1000 g gelato mix:
| Recipe target | SMP (g) | Resulting MSNF % |
|---|---|---|
| Light SMP boost | 30–40 | ~9–10% |
| Standard fior di latte | 50–60 | ~10–11% |
| Heavy MSNF (premium) | 70–80 | ~11–12% |
| Vegan recipes | 0 | n/a (use inulin instead) |
Above 80 g of SMP per 1000 g (= MSNF >12.5%), the lactose can supersaturate during cold storage and crystallize into a "sandy" texture defect. Stay under that ceiling.
Buying Guide and Suppliers
Common suppliers:
- Italian gelato suppliers: PreGel, MEC3, Fabbri, Comprital — typically sell pre-blended low-heat SMP optimized for gelato.
- Wholesale food distributors: any commercial dairy supplier carries SMP in 25 kg bags. Often cheaper than gelato-branded versions.
- Retail (smaller volumes): baking supply shops, Amazon, specialty grocery — usually medium-heat, fine for home/small operations.
Pricing: €4–8/kg in Europe for standard SMP, €8–12/kg for low-heat gelato grades. Bulk 25 kg bags 30–50% cheaper per kg than retail packages.
Storage: seal tightly after opening. SMP absorbs moisture from ambient air and clumps over time. Properly stored: 12–18 months shelf life. Once clumped: still usable but harder to dissolve cleanly.
Related Concepts
- MSNF (Milk Solids Non-Fat) — what SMP delivers
- Lactose — half of SMP composition
- Whole milk
- Why is my gelato icy? — SMP is the answer in 80% of cases
- Complete professional gelato guide
Stop the icy texture in one batch. Open the Free Gelato Balancing App, find your recipe with low MSNF, add 5–8% SMP — see MSNF jump into the 8–12% range. Make the next batch and the texture transforms.
Run these numbers live
Open the free balancer and adjust ingredients as you read.