Foams & Airs

Foams and airs create ethereal textures that contrast with dense frozen desserts. They range from stable, structured foams to ephemeral airs that dissolve on contact.

Lecithin Airs

Ultra-light foams made by aerating lecithin-enriched liquids. Dissolve instantly on the tongue.

Base Formula

Component	1x	2x
Flavorful liquid	200g	400g
Soy lecithin	1.5g (0.75%)	3g

Passion Fruit Air

Component	1x	2x
Passion fruit juice (strained)	200g	400g
Simple syrup (1:1)	30g	60g
Soy lecithin	1.7g	3.4g

Yield: Variable—foam volume depends on aeration

Method

1. Combine: Mix juice and simple syrup in wide, shallow container.

2. Add lecithin: Sprinkle lecithin over surface. Let hydrate 5 min.

3. Blend: Use immersion blender at surface level, tilted to incorporate maximum air. Blend 30–60 sec.

4. Collect foam: Skim bubbles from surface with slotted spoon.

5. Rest: Let foam stabilize 30 sec before plating.

6. Serve immediately: Lecithin airs are ephemeral—use within 2–3 min.

Note

Work at angle with immersion blender to maximize air incorporation. The goal is creating bubbles, not mixing liquid.

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Stable Foams

Longer-lasting foams using gelatin or agar for structure.

Gelatin-Stabilized Foam

Component	1x	2x
Flavorful liquid	200g	400g
Sheet gelatin	2 sheets (4g)	4 sheets (8g)
Sugar (if needed)	20g	40g

Raspberry Foam

Component	1x	2x
Raspberry purée (strained)	150g	300g
Water	50g	100g
Granulated sugar	30g	60g
Sheet gelatin	2 sheets	4 sheets

Method

1. Bloom gelatin: Soak sheets in cold water 5 min.

2. Heat base: Warm purée, water, and sugar until sugar dissolves and mixture reaches 60°C / 140°F.

3. Dissolve gelatin: Squeeze excess water from sheets. Whisk into warm liquid until dissolved.

4. Chill: Refrigerate until cold but not set, about 45 min.

5. Whip: Transfer to stand mixer. Whip on high with whisk attachment until tripled in volume, 3–5 min.

6. Use or store: Use immediately, or refrigerate up to 4 hrs.

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Siphon Foams

Pressurized nitrous oxide creates instant, stable espumas.

Siphon Foam Base

Component	1x	2x
Flavored base	500g (2 c)	1000g (4 c)
Sheet gelatin	3 sheets (6g)	6 sheets (12g)

Chocolate Espuma

Component	1x	2x
Whole milk	300g (1¼ c)	600g (2½ c)
Heavy cream	150g (⅔ c)	300g (1⅓ c)
Dark chocolate, chopped	100g	200g
Granulated sugar	50g	100g
Sheet gelatin	3 sheets	6 sheets

Method

1. Bloom gelatin: Soak in cold water 5 min.

2. Heat dairy: Bring milk, cream, and sugar to simmer.

3. Make ganache: Pour hot dairy over chocolate. Let sit 30 sec, whisk smooth.

4. Add gelatin: Squeeze sheets, whisk into warm ganache.

5. Strain: Pass through fine mesh into measuring cup.

6. Charge siphon: Pour into 1L siphon. Charge with 2 N2O cartridges. Shake vigorously 30 sec.

7. Rest: Refrigerate siphon 2 hrs minimum.

8. Dispense: Shake before each use. Dispense onto frozen dessert.

Caution

Always follow siphon manufacturer instructions. Never overfill. Vent before opening.

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Frozen Dessert Applications

Air/Foam Pairings

Foam Type	Frozen Base	Notes
Passion fruit air	Coconut gelato	Tropical contrast
Raspberry foam	Dark chocolate	Fruity brightness
Chocolate espuma	Vanilla bean	Classic combination
Coffee air	Hazelnut gianduja	Affogato inspiration
Citrus air	Berry sorbet	Acid-on-acid brightness
Mint foam	Chocolate	After-dinner elegance

Timing and Service

Foam Type	Stability	Service Window
Lecithin air	Very low	1–2 min
Gelatin foam	Medium	15–30 min
Siphon espuma	High	Hours (keep chilled)
Agar foam	Medium-high	30–60 min

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Citrus Air

Bright, acidic accent for rich bases.

Ingredients

Component	1x	2x
Fresh orange juice	150g	300g
Fresh lemon juice	50g	100g
Simple syrup (1:1)	30g	60g
Soy lecithin	1.7g	3.4g

Method

1. Combine: Mix juices and syrup.

2. Add lecithin: Sprinkle over surface. Hydrate 5 min.

3. Aerate: Immersion blend at surface, tilted, 45–60 sec.

4. Skim and serve: Immediately.

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Coffee Air

Intense coffee essence in ephemeral form.

Ingredients

Component	1x	2x
Strong brewed coffee, cooled	200g	400g
Simple syrup (1:1)	25g	50g
Soy lecithin	1.7g	3.4g

Method

Standard lecithin air method.

Application: Top vanilla or caramel ice cream for instant affogato effect.

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Vanilla Espuma

Elegant, stable foam for multiple applications.

Ingredients

Component	1x	2x
Whole milk	350g (1½ c)	700g (3 c)
Heavy cream	150g (⅔ c)	300g (1⅓ c)
Granulated sugar	60g	120g
Vanilla bean	1 pod	2 pods
Sheet gelatin	3 sheets	6 sheets

Method

1. Infuse: Split vanilla. Scrape seeds into milk and cream with pod. Bring to simmer. Steep 20 min off heat.

2. Bloom gelatin: Soak sheets.

3. Strain: Remove vanilla pod. Reheat liquid if cooled.

4. Dissolve: Add squeezed gelatin and sugar. Whisk until dissolved.

5. Charge: Fill siphon. Add 2 N2O cartridges. Shake well.

6. Chill: Refrigerate 2+ hrs.

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Equipment Reference

Tool	Purpose	Notes
Immersion blender	Lecithin airs	Tilt at surface for maximum air
Stand mixer	Whipped foams	Use whisk attachment
ISI siphon (1L)	Espumas	Professional quality
N2O cartridges	Pressurizing agent	Use ISI brand for consistency
Wide shallow container	Air production	Maximum surface area

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Troubleshooting

Issue	Cause	Fix
No foam forms	Lecithin not hydrated	Let hydrate 5 min before blending
Foam collapses instantly	Insufficient stabilizer	Increase lecithin or add gelatin
Foam too dense	Over-stabilized	Reduce gelatin; work more air in
Siphon clogs	Base too thick	Strain more thoroughly; thin slightly
Grainy texture	Undissolved lecithin	Blend longer; ensure proper hydration
Weak flavor	Diluted during foaming	Use concentrated base; adjust seasoning
Foam weeps	Insufficient stabilization	Add more gelatin; use immediately