Can hand poured coffee work with less than 15 grams of beans?

With fewer than 15 grams of beans left, a standard recipe will under-extract. The coffee bed gets thinner, less water is poured, and hot water contacts the grounds for a shorter time. On a conical dripper, bypass water can further dilute the cup. Two adjustments fix this: grind finer and slow the pour to lengthen contact.

Front Street's method keeps the ratio close to a normal single serving while shrinking the dose and water together. A finer grind and a gentler, smaller pour keep the hand brewed coffee from turning thin, so the last few grams of a bag still produce a drinkable cup instead of being thrown away.

Many times, when a bag of coffee beans is near the end, there are always less than 15 grams of scattered beans left, which is neither enough for a regular single serving dose nor enough to blend with other beans. If you don't want to waste them, you need to find a way to fully extract the value from these few beans. When the dose is on the low side, the brewed coffee tends to be under-extracted, because the coffee bed becomes thinner, the amount of water poured decreases, and the contact time between hot water and coffee grounds is shortened. If a conical dripper is used, bypass water can also dilute the coffee liquid. To address these difficulties, Front Street shares two approaches in this article to help everyone brew good-tasting coffee even with less than 15 grams of coffee beans.

As for why the dose affects extraction, Front Street has explained in previous articles: the amount of coffee directly determines the thickness of the coffee bed and the total amount of water poured, and these two factors in turn directly affect extraction efficiency. When we use a fixed brewing recipe to handle a dose outside the recommended range, the coffee can easily end up under-extracted or over-extracted due to a shift in extraction efficiency. That is exactly why the article "How to Brew a Large Dose with a Small Dripper" was written before.

Having covered how to brew with a large dose, today Front Street will talk about the other end of the situation: when the dose is less than 15 grams (that is, not enough for a single serving), how can you brew delicious coffee? Because many times, when a bag of coffee beans is used to the end, there will always be a few grams left, which are neither enough to make up a single serving nor enough to combine with other beans into a blend. If you don't want to throw them away and waste them, then we can only grit our teeth and brew them, extracting all their value.

Too few coffee beans—how to brew them deliciously?

Generally speaking, when the dose is too small, the coffee we brew tends to be under-extracted. Because, as Front Street has said, the amount of coffee affects the water amount and the coffee bed. The smaller the dose we use, the less water needs to be poured, and at the same time the coffee bed becomes thinner.

If we continue brewing in the original way, not only will the hot water finish pouring quickly, but the coffee liquid will also finish draining before the coffee's flavor compounds have dissolved out. The resulting coffee will taste bland and thin because the contact time between hot water and coffee grounds is insufficient.

And that's not all! If you are using a conical dripper, then because of the characteristics of the conical dripper, the surface area of the coffee grounds is reduced, making it easier for water to pour toward the edge of the dripper during pouring and form bypass water. This not only reduces the water that comes into contact with the coffee grounds, but also further dilutes the concentration of the coffee liquid—adding insult to injury.

In summary, we can see that the core reasons for failing to brew "low-dose coffee" well are mainly too little water, too fast a flow rate, and not enough extraction time. And if a conical dripper is used, there is also the issue that the surface area of the coffee bed is too small.

Although it looks troublesome, in fact these problems are easy to solve, since they are just issues of pouring and extraction efficiency. So when you want to brew a dose far below the dripper's recommended amount, you might as well refer to Front Street's two brewing approaches below~

The above content is compiled by CoffeeHunters, a coffee news website.