Steaming milk has two distinct phases, and doing them in the wrong order is why most home attempts fail.
Phase 1 — stretching
The first three to five seconds only.
Position the tip just under the surface. You want a gentle hissing or tearing sound — that is air being drawn in.
Every second here adds volume. A flat white needs two or three seconds; a cappuccino needs five or six.
Stop stretching by 37 °C (99 °F) — when the pitcher is still comfortable to hold. Air incorporated after that will not integrate.
Phase 2 — texturing
Submerge the tip deeper and angle it off-center to create a vortex.
The whirlpool is what shears the large bubbles down into microfoam. This is where a foam becomes a texture, and it is the part people skip.
Keep spinning until you reach temperature.
The temperature
Stop at 60 to 65 °C (140 to 149 °F) — when the pitcher becomes uncomfortable to hold for more than a second or two.
Above 70 °C (158 °F), the whey proteins denature and the milk loses its sweetness permanently.
Finishing
Bang the pitcher on the counter to pop large bubbles. Swirl until it looks like wet paint with a glossy surface.
Pour immediately. Textured milk separates within a minute.
Purge the wand first, and wipe it immediately after.
Last reviewed 30 October 2026