The concentrate tastes bitter or sour. If you find that your cold beer is a little acidic, it probably hasn't been extracted enough and you just need to prepare more. Add an hour or two or use a finer grind setting next time if you use the immersion method. The most common reason why sour coffee is tested is that it is not being fully extracted or because it is not being extracted enough.
This is why cold-brewed coffee can taste slightly bitter. If the beans and beer are fresh, the main reason cold beer is acidic is because it is “underextracted”. What does that mean? Think about tea. The tea leaves need some time to release all the aromas and flavors in the water.
Coffee is more or less the same thing. The taste and smell found in coffee grounds must enter the water before you can drink it. Sour coffee is a symptom of under-extraction during the brewing process. The good news is that this leaves the solution in your hands, since you'll only have to make minor adjustments to the way you prepare your coffee to avoid the unpleasantly spicy flavors of underextracted coffee (.
While fast pressurized extraction of an espresso may work best with the best possible grinds, most cold brewed coffee recipes call for a coarser grind. Lighter roasts can be a little difficult to do well and, especially with cold beer, you don't have much control to do it right every time. Getting a simple manual grinder and grinding fresh beans will dramatically improve the taste of cold beer. You'll experience problems over time early in your cold coffee preparation process, since it's hard to be patient.
When the brewing cycle is over, place the cup on top of the brewing chamber and then flip it over (hopefully, without bathing you or your kitchen, office, or camp with hot coffee and perches). To avoid insufficient extraction in the preparation method, choose a grinder size for coffee beans suitable for your preparation method. Of course, you can also go the other way and make sure that there's nothing that smells bad in the fridge at the same time as your cold beer. Now, if you've created cold lemonade, this is one of the reasons why cold coffee tastes sour.
The oils and solids left over from the brewing process can add sour and rancid aromas and flavors to coffee, even if the beans are freshly roasted and ground moments before preparation. Cold coffee is one of the most enjoyed beverages in the world, because it tastes great and keeps you energetic. If your cold beer tastes like water, a number of things could be happening and they all require slightly different solutions. These come in a variety of formats and include many of the fastest cold beer products on the market today.
Fortunately, with a few small tweaks to your preparation method, you can say goodbye to cold sour-tasting coffee and welcome the rich flavors you expect with every sip. Get one that's the right size for your needs, otherwise you could end up consuming too much cold beer.