Latte Art

The two most common forms of poured latte art are a heart shape and the "rosetta" or "rosette", also known as "fern" which resembles a type of flower or fern. Of these, hearts are simpler and more common in macchiatos, while rosettes are more complex and more common in lattes.
For free pouring, the cup is either kept level or tilted in one direction. As the milk is poured straight into the cup, the foam begins to surface on one side (due to the tilt). The barista then moves the pitcher from side to side as they level the cup, or simply wiggle the spout back and forth, and finishes by making a quick strike through the previously poured pattern. This "strike" creates the stem portion of the flower design, and bends the poured zig-zag into a flower shape.
A more direct pour and less wiggling yields a heart shape, and minor variation (reduced lobes, larger stem) yields an apple shape.
More complex patterns are possible, some requiring multiple pours.