Question about coffee/soymilk interaction!

[killerkiller]

What makes soymilk curdle in coffee? This only happens to me sometimes. I have a couple theories. They are probs wrong

Comments

[oh_spit]

soymilk has never curdled for me in coffee.

is the soymilk old?

[jess_suzanne]

I have come to the conclusion that the soy milk only curdles if it is warm.

[pickupthepeices]

Well, working at the 'Bucks, and bein' a Soyhead myself I've come in contact with that strange occurence before.
1. The coffee is probably too hot. Ideal temp. for coffee is between F 140-160 degrees.
2. Some soymilks are weak. They can alter taste, thickness, and appearance when heated or cooled extremeley. Silk makes a special kind of Vanilla Soy for Starbucks, that is slightly sweeter and can withstand the steam wand we use to make soy lattes.
3. Some coffees have high acidity, causing any milk to curdle. African coffees are nototrious or this, as there is an almost lemon juice level of acid in some blends.
So, really, you were right on all accounts.

[prazzy]

have you tried pouring soymilk into the cup first and then pouring the coffee over it?
my mom does that with her creamer, not sure which kind she uses

[meredithology]

my brother tried to solve this same problem once, and i think that it was more about there being a large temperature difference between the soy milk and the coffee. also, i remember him pouring it in WHILE stirring and i thought that made a difference.