The steamed foam served with cappuccino serves as an insulator.

The foam on top of the Cappuccino does help retain the beverage's hotness as the foam is steamed under particular temperatures for its thick layer.

The foam on top of the Cappuccino does help retain the beverage's hotness as the foam is steamed under particular temperatures for its thick layer.The Italian coffee drink is prepared with espresso, hot milk, and milk foam. The steamed foam made with milk that sits on top of the cappuccino helps retain the liquid's heat for a longer time than a drink without the creamy layer. Ideally, cappuccinos are served in a ceramic cup, contributing to the drink's temperature maintenance for a longer time. The foam layer adds to that and provides different flavors for variety and taste enhancement.

Reference links

Convergent Coffee

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Perfect Daily Grind

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The Spruce Eats

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