Latte art starts in the jug

Texture is ninety percent of the result

Almost every pattern that fails was lost at the steam wand. You can pour badly with good milk and still get something recognisable in the cup. You cannot pour well with bad milk, and no amount of practice with the jug will change that, so the first thing to fix is not your hand.

The target is paint, not meringue. Correctly textured milk has a glossy, slightly wet-looking surface, moves as one liquid when you swirl it, and shows no visible bubbles. It should look like emulsion paint being stirred. Meringue is the failure: a stiff white head on hot milk, the two separating the moment you stop moving. It will not flow out of the spout at a controllable rate, and when it finally does it lands as a lump.

The mechanism is simple enough. Air goes in at the start, while the milk is still cold: roughly two seconds for a flat white, one for a latte, three to four for a cappuccino. Everything after that is folding, not aerating. Drop the wand tip deeper, get the jug spinning, and let the whirlpool break the bubbles you made into microfoam. Stop at about 60 °C. Past 65 °C the proteins slacken and the milk will not hold a line however well you aerated it.

Then pour immediately. Textured milk has a working life of around twenty seconds, after which the foam climbs and the liquid underneath thins, and one last swirl does not bring it back. Tap the jug once, swirl until the surface shines, and go.

The jug and the cup

Two pieces of kit make this meaningfully easier, and neither is expensive.

The jug wants a spout with a defined tip rather than a broad, rounded lip. The tip controls where the milk lands and how wide the stream is. A rounded lip spreads the flow, which is fine for filling a cup and hopeless for drawing. Size matters too: fill a jug between a third and a half full, so a 350 ml jug suits one flat white and a 500 ml jug a latte. An underfilled jug has to be tipped almost vertical to pour, which costs you all your control.

The cup wants a rounded base and sloping sides. A tulip or a classic cappuccino cup lets the poured milk roll up the wall and back into the centre, which is what circulates the crema and builds the white surface you draw on. A tall straight-sided mug drives the milk to the bottom, where it stays. Around 160 to 180 ml is the easiest size to learn in, because the pattern fills it.

The pour has two phases

Phase one: break the crema. Hold the cup tilted towards you at maybe 20 degrees, start with the spout 5 to 10 cm above the surface, and pour a thin steady stream into the centre. From that height the milk goes under the crema instead of sitting on it, so it mixes rather than marking. Keep going until the cup is roughly half to two thirds full and the surface is an even brown with no white showing. If white appears in this phase, you are too low or pouring too fast.

Phase two: float the pattern. Bring the spout right down, almost touching the liquid, and speed the flow up. Close to the surface the microfoam stops sinking and starts sitting on top, which is the whole trick. As the cup fills, level it gradually so the surface comes up to meet the spout.

Two things people get wrong here. They never get close enough, so nothing white ever surfaces, and they slow down when they drop, when the flow should increase. High and thin, then low and fast.

Learn the heart first

A heart is one movement, which is why it is the starting point. Pour phase one as above. Drop the spout to the surface at about two thirds full and hold it still in the centre, letting a white disc grow and push outwards. When the disc almost reaches the cup wall, lift the jug slightly and draw a thin line straight through the middle of it, towards yourself, finishing at the far rim. The disc pulls into a point and closes.

What the mistakes look like, so you can read your own cup:

• No white at all. You stayed too high in phase two, or the milk is too thin because air went in too late.
• A white blob with a ragged edge. Too much air. The foam is dropping in lumps rather than flowing.
• A small heart stranded in a big brown cup. You started the second phase too late, with no room left to grow the disc.
• The heart is off-centre or oval. The jug drifted, or the cup was still tilted when you drew the line through.

Pour hearts until they come out round three times in a row before moving on to a tulip, which is just three hearts stacked, and only then to a rosetta. Nobody pours a clean rosetta in their first week, and chasing one early mostly teaches you to hide bad milk behind a complicated shape.