Macadamia Gelato

Softer out of the freezer than most nut gelati, buttery rather than greasy, with a delicate aroma that survives the cold instead of vanishing in it.

Where this goes wrong at home is the dose. More paste feels like more flavour, so a home batch climbs to 90 or 100 g per kilo the way it would with pistachio, and what comes out is greasy at the front, hard at the back, and quieter rather than louder. This is the fattiest nut there is, around 76 percent lipids, so every extra gram is mostly fat, and fat that high sets stiff and smothers the delicate half of the aroma. Holding the paste at 65 g keeps it leading while the dairy still has somewhere to sit, and 25 g of dextrose does the softening, so the tub stays scoopable without tasting any sweeter.

So 65 g/kg. It delivers 4.9% vegetable fat, it is still a leading flavor dose, and it leaves space for the dairy fat a milk base needs. Total fat finishes at 8.58%, mid band inside 5 to 12. The same pressure shows in the cream line: heavy cream was capped at 140 g/kg for this recipe and the balance used only 35 g, with 682 g of whole milk doing the rest.

The nut's low protein is an advantage here. At 7.9% protein, macadamia does not push the protein indicator against its 5% ceiling the way pistachio does, so protein lands at 4.23% and there is room for 38 g of non fat dry milk, which is what brings MSNF to 9.98% inside 8 to 12.

Sucrose runs at 150 g/kg, higher than in most nut gelatos, because macadamia brings only 4.6% sugar of its own. Total sugars finish at 17.57%, mid band in 14 to 22.

Ingredients

Makes 1000 g of finished base.

Method

Loaf pan freeze, three blender passes

1. 1Whisk every dry ingredient together first: sugars, milk powder, stabiliser and salt. Dry-blending them stops the stabiliser clumping when it meets liquid.
2. 2Warm the liquids to 40 C (104 F), then rain the dry mix in while whisking hard.
3. 3Heat to 82 C (180 F) and hold for 2 minutes so the stabiliser hydrates.
4. 4Off the heat, whisk in the paste, then blend 60 seconds so the fat emulsifies instead of separating.
5. 5Chill in an ice bath to under 5 C (41 F) within 2 hours. Slow cooling is where bacteria and coarse crystals both start.
6. 6Age 6 to 12 hours in the fridge under 5 C (41 F). This is when the stabiliser and the milk protein take up water.
7. 7Freeze in a shallow metal pan 2 to 3 cm deep, breaking the crystals with a fork every 30 to 40 minutes, 4 to 6 times.
8. 8Freeze firm, then temper 10 to 15 minutes in the fridge before scooping.

The balance

All six against the professional range for Milk Gelato.

Fat at 8.58% explains the texture and the service temperature at the same time. Roughly 60% of macadamia oil is oleic and palmitoleic acid, monounsaturated fats with a low melting point, so this base melts faster on the counter than a hazelnut one at the same fat level. That is why it serves at -12 C rather than -14 C, and why the display window is shorter. POD at 177.52 sits in the upper half of 135 to 200, which is what 150 g/kg of sucrose against a nut contributing 4.6% sugar produces, and PAC at 256.35 lands mid band in 220 to 300, firm enough to hold a scoop at that warmer serving temperature. Lactose at 8.74% of the water phase clears the sandiness check with margin, which is what allows 38 g of non fat dry milk in a base already carrying 682 g of whole milk.

If it goes wrong

Allergens: milk, tree nuts

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