The Gelato Lab
Long-form notes from a working gelato lab. Real recipes, real numbers, every batch traceable back to PAC, POD, MSNF and Total Solids.
Master gelato like an Italian gelatiere. Complete guide on ingredients, balancing science, equipment, methods, recipes and troubleshooting. Pro tips inside.
Why pomegranate, persimmon and dark berries can leave sorbet dry and rough, how tannins strip saliva, and four levers to fix it without piling on more sugar.
Pull citrus oil into sugar with no heat and no bitter pith. How to make oleo saccharum for lemon or orange sorbet, and how to count its sugar in the recipe.
Peaches reading 9 °Bx instead of 12? Turn the refractometer gap into grams of sucrose and invert sugar and keep stone fruit gelato balanced batch after batch.
Konjac binds water, xanthan thins under shear and ignores acid. Origins, EU limits, dose, the ratio where the two gums gel, and which one to choose when.
Toast barley, buckwheat or rice, steep it in milk and keep the recipe balanced. Safe cold and hot infusion routes, how to correct milk loss, what to pair.
Gelato freezes twice: scraped in the batch freezer, then still during hardening. How each stage sets ice crystal size, with numbers from Hartel's research.
UK double cream is at least 48% fat, US heavy cream 36%. The legal definitions, MSNF and water in each, and exact swap ratios that keep a gelato balanced.
Evaporated milk doubles the milk solids of fresh milk with no added sugar. USDA composition, PAC and POD, the water it carries and a worked swap for powder.
Low heat and high heat milk powder share the same MSNF but not the same behaviour. WPNI classes, flavour, solubility and which one suits each gelato base.
Corn syrup solids are glucose syrup without the water. PAC and POD per gram of solids, US and EU definitions, and how to convert a recipe from syrup to powder.
Polydextrose restores the solids you lose when cutting sugar, and counts as fibre. PAC and POD values, EU and US energy factors, and a worked 60 g swap.
Every article in this lab is built on the same calculator you can use right now. Plug in your ingredients, watch PAC, POD, MSNF and Total Solids update live, and lock in a recipe that actually scoops at -12 °C. No signup wall, no paywall — free for working gelatieri.
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