by ChrisC on Tue Apr 06, 2010 3:37 pm
I think this is all good advice, but I second the thought that it's more likely about not getting the spout of the pitcher close enough to the coffee surface. Once you've attained good milk texture (which varies from thinner for latte milk to thicker for cappuccino -- think liquid paint for the latter, and about halfway between that and regular unfoamed milk for the former), it really becomes about the height and angle you're pouring from, and of course just maintaining a constant flow. Start by pouring at a safe enough height not to splash, but then immediately moving the pitcher up higher and continuing the pour from there -- the milk will drop straight through the surface of the coffee without leaving a mark, like a diver diving straight into a pool without disturbing the surface. If there was an initial mark on the surface from starting lower, you can pour into that to push it under, leaving a perfect unmarked surface on which to pour your art. Then, when the cup is about half to 2/3 full, move the pitcher down, getting the spout as absolutely close to the surface of the coffee as possible. (Tipping the cup makes this much easier to do, allowing you to get the spout right into the cup, but adds a degree of difficulty in that you have to do something with your other hand, and you have to slowly right the cup as you fill it up to full. I've seen people have success either way, but I tip the cup.) If the spout is close enough to the surface, you will now be pouring the milk forwards out and onto the surface rather than dropping from above, allowing it to float there. Watch more latte art videos and you'll see that the moment the milk starts to mark the surface is always the moment the pitcher spout gets close to the surface. I think the fact that you're only seeing it mark the surface when your cup is full is because only then are you pouring close enough to pour out onto the surface rather than dropping from above. Try tipping the cup and getting lower earlier. Also note that tall narrow cups make this harder than short, wide, bowl-shaped ones.
I also second steaming with a thermometer until the milk is between 140 and 150 F when you're done (being aware that you have to stop steaming a little before this range because the temperature coasts up a bit afterwards), thunking it on the table to pop any visible bubbles, and then swirling constantly until you're ready to pour. I wouldn't overly thunk, or let it sit, because then you get separation between the liquid milk and the foam, the exact thing you're trying to prevent with the swirling, but perhaps others have had luck with this technique. I say swirl continuously until you pour, and pour as soon as you can!