If you’re like me, you’ve spoiled more than one bag of coffee. You know the drill: Grab your go-to roast, grind it up with care, and plop some water onto it. But instead of coffee, you get harsh battery acid or watery dirt. Most times, it’s not the beans’ fault. More often than not, it’s the ratio.
Making coffee is an exercise in basic chemistry, not magic tricks. What you’re doing is extracting certain soluble compounds from ground-up bean and keeping the bitter, astringent stuff out of the cup. And for that, precision is key. So what’s the right amount? Well, as chart above shows, there isn’t any one answer for all cups. Each approach has a sweet spot.
How to Make Better Coffee
Sixteen-to-one works well for pour-overs; after all, you’re looking for a bright and clear brew. You want as little contact time with water as possible. It should be enough to extract the fruity flavors but not long enough to bring along gritty ones. Because of this, quick flow-through is important.
By comparison, drip coffee skews more towards seventeen-to-one. This is still a fairly weak brew, intended more for comfort than strength. On paper, the two numbers don’t seem like much different from each other, but it makes an enormous impact on character of your morning drink. Most folks overlook this aspect: They think of all their brewing as the same thing, when it really isn’t.
Espresso? That’s a whole other world altogether. In that situation, you’re pushing water through densely-packed grounds using a high-pressure pump. The end product is concentrated syrup. It ain’t a drink that wants to be consumed in big gulps. If you used an equal amount of water as you do in your French press when brewing espresso, you’d find yourself drinking nothing but hot, brown tap water.
The math depend entirely on context. And cold brew? Again, extreme ratios are at play here, this time because time takes over where heat leaves off as the driving force behind extraction. You’ll steep coarse coffee grounds in cold water for twelve hours or more, letting the cold liquid gradually extract flavor without stirring. The final product is a smooth, low-acid concentrate that you’ll want to mix to taste.
The ratio also goes hand in hand with grind size. Think of it as a balance. A finer grind exposes more of ground surface area to the water, making it extract faster. However, if you have that fine grind but add too much water or leave your coffee brewing too long, you’ll end up over-extracting and making your cup bitter.
On the flip side, a coarse grind resist extracting. That’s why they’re great in something like a French press, where you allow the coffee to steep for four minutes. You want those bigger chunks so you don’t end up with a cup of muddy sludge. The piece explain that the equipment determines the flow rate and thus suggest what grind texture you should of be using for each method: “You can’t alter one variable without altering the rest.”
Temperature also matters (as if I hadn’t beaten you over the head with this point enough). Water right at the boiling point… Roughly 205 degrees Fahrenheit, is what most recipes suggest. That hot water will bring out more acidity and extract faster. If you’re doing something colder, such as cold brew or AeroPress, then flavors will differ since some compounds won’t be extracted.
For example, you might notice that your beloved dark roast has less bitterness but instead tastes sweeter when done a bit cooler. This is because the hotter water expose those bitter compounds while the cooler water doesn’t.
As with source of your coffee, the quality of your water is key. Ninety-seven percent of your brew is made up of water; it’s time for it to be some good water. Filtered tap water, ideally from filtered tap water, is fine: there are enough minerals present to contribute to extraction process without any chlorine, which will spoil your coffee’s flavor. In fact, distilled water isn’t good here at all. Because it is too pure, it doesn’t have the right minerals to extract flavor from beans correctly. You will end up with a dull, flat cup. A little thing, but it makes a difference to final tasting experience.
If you’re looking for consistency, go by scale. Coffee beans come in all shapes and sizes and vary greatly depending on their roast level, so scoops can be highly inconsistent. Using a scale ensures you are measuring out the exact amount you want. When you dial in the ratio, don’t mess around. Use what works for you and jot down the numbers. Tweaking temperature and grind size can adjust the taste, but starting with the base ratio gives you a great foundation for your coffee.
You aren’t striving for perfect every time. Instead, just know what made the previous cup taste different than this one and how to change it. Knowing that makes drinking coffee a craft instead of just a habit, and that’s why the extra minute of preparation time is well worth it.