Overheard a barista in Seattle explain why her latte art never worked before. One tip about milk temperature changed everything for me.

3 comments

3 Comments

Wait until you find out the actual science behind why steamed milk holds foam. It's not just about hitting 140 degrees. The proteins in milk denature at different temps and that changes everything about how your foam sticks around. I spent a whole afternoon with a thermometer testing milk at 130 vs 150 and the difference in microfoam stability was honestly shocking.

harper_foster1mo ago

pat_fisher24 you just blew my mind a little bit (okay a lot) because I always thought the magic happened right around 140 and anything past that was just overkill. The whole thing about proteins denaturing at different temps is something I've never really thought about but now I can't stop thinking about it. I mean, you literally tested it with a thermometer and saw the difference, that's the kind of dedication I respect. So the 130 stuff is more watery and falls apart quicker, while the 150 stuff holds its shape way longer? That actually explains so much about why some baristas nail it every time and others just get sad bubbles. I might have to steal your afternoon experiment idea (sorry not sorry) and try it myself because I need to see this with my own eyes.

patricialee1mo ago

Nah, gotta disagree on this one. 130 degree milk actually makes way more consistent microfoam in my experience because the proteins haven't started breaking down yet. At 150, that foam might look stable at first but it separates way faster once it sits for a minute. I watched a barista friend do a side by side and the 130 stuff held its design even after 5 minutes while the 150 one turned into a blob. Plus, 150 degree milk scalds your tongue and masks the actual coffee flavor. That's probably why so many chain shops burn their milk and hide it under sugar.