What is the primary purpose of steaming milk in the latte preparation process?

The primary purpose of steaming milk during the preparation of a latte is to create texture and temperature. When milk is steamed, it undergoes a transformation that incorporates air into the liquid, resulting in a velvety microfoam that enhances the overall mouthfeel of the drink. This texture is crucial for lattes, as it allows the milk to blend seamlessly with the espresso, creating a harmonious balance between flavors.

Additionally, steaming milk raises its temperature, which is essential for serving a hot latte. The heat also helps to release the natural sweetness of the milk, contributing to a richer flavor profile that complements the espresso. While increasing volume and adding flavor may be secondary effects of steaming, the primary focus is on enhancing texture and achieving the right serving temperature for the drink.