What is microfoam?

Milk foam with very fine, evenly distributed air bubbles — glossy, velvety, almost liquid. Unlike coarse foam heads, microfoam has a creamy consistency that mixes well with espresso. A prerequisite for latte art.

Why that is

Not all milk foam is the same. There is a fundamental difference between the coarse, stiff foam you know from cappuccinos out of fully automatic machines, and the fine, glossy microfoam that baristas use in specialty coffee shops.

Coarse foam (macrofoam):

• Large, visible air bubbles.
• Dry, stiff consistency — sits on top of the coffee like a cap.
• Does not mix with the espresso — foam and coffee remain separate.
• Collapses quickly.
• Not suitable for latte art.

Microfoam:

• Tiny air bubbles, so small that they are not visible to the naked eye.
• Glossy, velvety surface — looks like wet white paint.
• Creamy, almost liquid consistency — pourable, not spoonable.
• Mixes homogeneously with the espresso — the entire cappuccino becomes creamy, not just the top layer.
• Stable and long-lasting.
• Essential for latte art.

How microfoam is created:

1. Draw in air (stretching). Hold the steam wand just below the surface of the milk. The hissing sound indicates that air is being drawn in. Only 1–3 seconds — a little air is enough.
2. Rolling (texturing). Submerge the nozzle deeper into the milk and get the milk moving in a circular motion (whirlpool). Rolling distributes the incorporated air into ever smaller bubbles and creates the velvety texture.
3. Not over 65 °C. Overheated milk can no longer hold a stable microfoam.

Test: You can recognize good microfoam by the fact that it shines and flows like honey when swirled in the pitcher. If you can spoon it or if it looks like shaving cream, that was too much air.

In practice at Green Wall Coffee

At Sophienstraße 27, microfoam is standard for every cappuccino and flat white. The difference compared to coarse foam is enormous — not just visually, but in mouthfeel. Once you’ve had good microfoam, you won’t want coarse foam anymore.

Stop by Sophienstraße 27 — Mon–Fri 8am–5pm, Sat 10am–5pm.