Milk-Splitting
How to Steam One Pitcher of Milk to Make Two Drinks
When it gets busy on a bar, it is faster to steam for two drinks at a time. But if you split your milk by pouring the top half of a pitcher into one latte and then the bottom half into a second latte, the first one will always be much foamier. You need a strategy to distribute the foam evenly, in the least time-consuming manner possible, to give your customers consistency of coffee flavour intensity. The protocol we use for milk-splitting is the Four Quarters Method.
The milk at the bottom of a freshly steamed pitcher of milk will always contain fewer air bubbles than the milk at the top.