Emulsifiers & Aeration
Soy Lecithin & Flavour Airs
Soy lecithin is a phospholipid emulsifier that, when dispersed in a liquid and agitated with an immersion blender, creates an exceptionally stable foam of tiny air bubbles — an "air" in modernist terminology. Unlike a conventional cream foam, a lecithin air uses no fat: it is almost entirely flavour-forward liquid with the barest texture of bubble. The technique: add 0.3–0.5% soy lecithin to a filtered, flavourful liquid (pineapple juice, cucumber water, citrus). Tilt the container and blend at the surface to generate foam. Collect foam with a spoon immediately.
The Whipping Siphon
An iSi or similar whipping siphon charges a liquid with N₂O (nitrous oxide) under pressure. When dispensed, the gas expands and aerates the liquid into a light, stable foam or mousse. Unlike a conventional whipped cream, the siphon can aerate hot liquids (up to 75°C) — producing a hot potato mousse, a warm hollandaise foam, or an aerated mushroom bisque. The technique: fill the siphon no more than 2/3 full, charge with one or two N₂O cartridges, shake vigorously, and hold upside down to dispense.
Lipid Deconstruction — Powders
Tapioca Maltodextrin
Tapioca maltodextrin is a modified starch derived from tapioca that has the unusual property of absorbing large amounts of fat while remaining a dry, free-flowing powder. At room temperature it looks and feels like a dry powder. On contact with the warmth of the mouth, it instantly converts back to the original fat — delivering the flavour and mouthfeel of the fat in a completely unexpected format. The ratio: 60% fat to 40% maltodextrin by weight produces a good powder that maintains its structure on the plate.
Execution — Bacon Fat, Truffle & Peanut Butter Powders
The process: warm the fat to liquid form. Combine 60g fat with 40g maltodextrin in a food processor. Pulse, scraping down, until the mixture becomes a uniform dry powder. If too wet, add more maltodextrin. If too dry, add more fat. The result should be a powder that holds its shape in a quenelle but dissolves instantly on the tongue. Applications: "peanut butter snow" on a chocolate dessert, bacon fat powder on a savoury dish, or truffle oil powder used as a finishing element on risotto.
Truffle Powder & Citrus Air Service
Create two separate modernist textural elements: (1) a truffle oil powder using tapioca maltodextrin, plated over a risotto or pasta, (2) a citrus lecithin air served as a garnish over a crudo or chilled soup.
Success criteria: Truffle powder maintains dry, powder form on the plate at room temperature for at least 5 minutes. On tasting, it melts instantly and delivers truffle flavour cleanly. Citrus air consists of visible, stable bubbles that hold for at least 90 seconds without collapsing. Both elements enhance the dish they accompany.
Phase 3 Practice Exercises
12 exercises to build skill through direct application.
Lecithin Concentration Test
Make citrus juice airs at 0.2%, 0.4%, 0.6%, 0.8% lecithin. Compare stability and foam density.
- Scientific precision
- Technique mastery
- Creative application
Lecithin Air Service
Make a pineapple lecithin air. Serve it over a cold soup within 90 seconds of preparation.
- Scientific precision
- Technique mastery
- Creative application
Siphon Hot Foam
Make a hot potato and leek foam in a whipping siphon. Serve at 65°C.
- Scientific precision
- Technique mastery
- Creative application
Siphon Cold Mousse
Make a cold strawberry cream mousse using the siphon without gelatin.
- Scientific precision
- Technique mastery
- Creative application
Maltodextrin Ratio
Test bacon fat powder at 50:50, 60:40, and 70:30 fat-to-maltodextrin ratios. Find the best texture.
- Scientific precision
- Technique mastery
- Creative application
Truffle Powder
Make truffle oil powder. Test plate stability over 10 minutes at room temperature.
- Scientific precision
- Technique mastery
- Creative application
Peanut Butter Powder
Make peanut butter powder. Use it on a chocolate dessert. Assess flavour delivery on the palate.
- Scientific precision
- Technique mastery
- Creative application
Olive Oil Powder
Make extra virgin olive oil powder. Assess the flavour delivery compared to liquid olive oil drizzle.
- Scientific precision
- Technique mastery
- Creative application
Siphon Troubleshooting
Diagnose a blocked siphon nozzle. Clean, re-charge, and re-dispense.
- Scientific precision
- Technique mastery
- Creative application
Combined Texture Plate
Build a small plate using a fluid gel, a lecithin air, and a fat powder simultaneously.
- Scientific precision
- Technique mastery
- Creative application
Stability Testing
Leave a lecithin air, an agar fluid gel, and a fat powder on a plate for 30 minutes. Photograph their behaviour over time.
- Scientific precision
- Technique mastery
- Creative application
Full Milestone Service
Execute the truffle powder and citrus air milestone simultaneously.
- Scientific precision
- Technique mastery
- Creative application