If large bubbles are consistently appearing in your steamed milk, which of the following might be the cause?

When large bubbles consistently appear in steamed milk, it is often due to the steam wand being submerged too deep in the milk. Submerging the steam wand too deep can lead to insufficient introduction of air into the milk, which causes larger bubbles to form as the milk is heated. Proper positioning of the steam wand is crucial; it should be placed just beneath the surface of the milk to allow for ideal aeration.

Additionally, when the wand is positioned too deep, it may create a turbulent environment that can disrupt the formation of a creamy microfoam, resulting in larger, less desirable bubbles. Understanding the right technique for steaming milk, including the appropriate depth of the steam wand, is essential for achieving the perfect texture and consistency desired in beverages like lattes and cappuccinos.