In the Cup ·
In the Cup · 03: Latte foam is made of air
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IN THE CUP · 03
Latte foam is made of air
The foam in your latte is an air foam, not a steam foam.
1. Steam turns back into water as it cools, so it can't hold a bubble. Steam brings the heat and the energy to drag air in.
2. Aim for about a third more volume. Under 20% stays too wet for latte art; over 50% gets too dry.
3. Add air early, while the milk is still cold. Then sink the tip and let the milk spin as it heats.
4. Research cited by Barista Hustle found whole-milk foam holds best at around 50–60 °C. Hotter isn't better.
What temperature do you steam to?
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Citations
- Sources: Barista Hustle, Milk Science course
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