But I strongly prohibit using spoiled or expired almond milk in your coffee which always spoils your cup of coffee too. Typically this happens in lighter roasts. This includes soy milk, almond milk, oat milk, coconut milk, and rice milk. ----- The most important part of our job is creating informational content. However, most non-dairy substitutes can still curdle. eval(ez_write_tag([[300,250],'coffeecherish_com-box-3','ezslot_8',116,'0','0']));Almond milk is nowadays the most favourite non-dairy milk option for several coffee drinkers. Does it mean that the milk has spoiled? almond milk, old … This can be alarming as curdled milk is often seen as the same as spoiled milk. If you haven't had any luck with pouring the almond milk into the cup first, or adding a splash of coffee to the almond milk first before adding a whole glass, you could try a coffee variety with lower acidity. ", "Very watery and has almost no foamy texture to it. Almond milk curdles in coffee because of the heat and acidity of the black coffee. Coffee and tea are both slightly acidic, although usually not enough to curdle fresh milk. Such low quality milk easily gets curdled when added to the hot cup of coffee.