3
votes
1answer
166 views

Why brewed coffee in a pot needs a lid?

Coffee in an electric drip brewer (a model like this) goes all murky brown and opaque very fast, when the pot is left without a lid. With lid, it stays translucent and bright dark brown for quite a ...
4
votes
4answers
3k views

Why does salt prevent soy milk from curdling in hot coffee?

As many people have experienced, soy milk will often curdle in hot coffee. I've experienced this myself with both instant and fresh coffee, and with my homemade soy milk (not my favorite soy milk ...
4
votes
2answers
354 views

By what reactions do moisture and light steal away my coffee's freshness?

Typically, the standard advice for prolonging your coffee is to store it in an air-tight, light-tight, dry container. At a chemical level, what happens when coffee is left in humid or sunny conditions ...
11
votes
2answers
1k views

Coffee foam vs. Tea foam

One sign of really good fresh well-roasted coffee beans is foam. When you pour hot water into the French press, it foams, often forming a head up to 2" high. And when you use an espresso machine, ...