Three shapes, and the order that teaches them
Most people who give up on latte art give up early, after trying a rosetta because it is the shape they have seen. The three shapes below are a sequence rather than a menu: a heart teaches the height of the pour, a tulip teaches the pause, and a rosetta teaches the wiggle, and each one uses what the one before it built. Learn them in this order and the third arrives sooner than it does for anyone who starts with it.
Before any of them, one thing has to be true: the milk has to be right. A pattern is a thin white layer floating on crema, and milk that is too thick will not float and milk that is too thin will not hold an edge.
The heart: one pour, and the height is the lesson
A heart is a single continuous pour with a lift at the end. Start high, so the milk goes under the crema and the surface stays brown, and then drop the jug spout close to the surface once the cup is about half full, a working cue rather than a measured point, so the white starts to sit on top. Keep pouring in one place until a white circle grows, then lift the jug and draw a thin line straight through the circle towards yourself.
Everything that goes wrong with a heart is height. Too high for too long and no white appears at all; too low too early and the cup fills with a shapeless white patch that spreads to the rim.
The tulip: the same pour, stopped and restarted
A tulip is a stack of hearts pushed into each other. Pour the first white circle as before, then stop the flow completely, move the spout back a short way, and start again so the second circle pushes the first one forward. Repeat once more if the cup has room, and finish with the same lift and line through all of them.
The lesson here is the stop. Beginners let the flow trail off instead of cutting it, and a trailing stop blurs the boundary between the two shapes so the tulip reads as one long blob. Cut it cleanly, count one, and start the next.
The rosetta: the wiggle, and why it comes last
A rosetta is a heart poured while the jug moves side to side, then pulled through. The wiggle has to be small, fast and steady, and the jug has to travel slowly backwards across the cup while it wiggles, which is two motions at once. That is why it is third: the height control came from the heart and the clean stop came from the tulip, and the rosetta adds only the new thing on top of both.
If the leaves come out lopsided, the wiggle is uneven. If there are no leaves at all, the jug was too high; if the whole cup is white, it was too low.
The jug is half of it
A pattern is poured through a spout, so the spout is doing as much work as the hand is. A narrow spout gives a thin stream that draws a fine line, and a wide one gives a broad stream that fills a cup fast and draws a blunt one. The 20 oz pitcher with etched graduations is a straightforward example: the graduations are there for measuring milk volume, and pouring the same volume every practice session removes one variable from a practice that has plenty.
One thing to check before buying anything: the same manufacturer also sells a centre-post variant of the same 20 oz jug aimed at improving milk aeration. Aeration is a steaming question rather than a pouring one, so a centre post is not what a pattern needs, and a reader practising shapes should not read it as an upgrade for this.
Why the pattern comes out small, blobby or full of bubbles
Each of those is a different mistake and each one has a stage attached to it. A pattern that stays small means the white started too late: the jug came down near the end of the pour, so there was not enough milk left to grow the shape before the cup filled. A blob is the opposite, a jug brought low early and held in one place, so the white spread across the surface before it was ever steered. Bubbles sitting on the finished drink mean the jug was not knocked and swirled before pouring, because a large bubble poured onto crema stays a large bubble. A pattern that will not spread at all is usually the milk rather than the hand, and that is the section below.
What to change when the shape fails
Most failures here are the milk rather than the hand, and that is a judgement rather than a counted proportion. If the surface goes white immediately, the milk is too thin and was not stretched enough; if the white sits in lumps and refuses to move, it was stretched too much and never spun back together. Both are fixed in the jug before the pour begins, and steaming milk is where that happens.
Practise on a drink you will actually finish. A cortado uses little milk and a small glass, so a morning of practice is a run of small drinks rather than large ones nobody wants.
