If you have a late-night craving for pour-over after working overtime, you do not have to worry about insomnia. Avoid Robusta and choose high-altitude grown Arabica beans, whose natural caffeine content is noticeably lower, making them relaxed and pleasant to drink at night. If you want to enjoy a comfortable, warm pour-over before bed, the key is to understand the harmony between extraction yield and strength, so that the aromatic substances in the coffee grounds are released just right and the cup tastes smooth enough.

We can compare making pour-over to brewing a pot of floral fruit tea. The strength determines whether the tea is rich and full or light and clear, while the extraction yield represents how much flavor has been washed out of the coffee grounds. The coffee-to-water ratio directly builds the strength framework of the whole cup, while grind size and brewing temperature are like the accelerator and brake, constantly influencing the extraction yield, and a slight change will make the flavor in the cup take on a completely different character.

If the brewed coffee tastes weak, it is usually because the coffee-to-water ratio is too large, or the water temperature is too low and the grind is too coarse, so the good flavors have not fully dissolved. If it feels too strong and heavy, it is most likely because too much coffee was used or too little water was added. If your throat feels tight and astringent after drinking, then over-extraction caused by too fine a grind or too high a water temperature has brought the unpleasant woody off-flavors of the tail end into the cup, ruining the original clean sweetness.

As long as you understand the rules of the parameters, you can adjust the same bag of beans to a pleasant state. If the cup is weak, grind half a step finer, or raise the water temperature by two degrees to push extraction higher. If you notice a tendency toward bitterness and astringency, quickly grind coarser and speed up the pouring rhythm so the water flows quickly through the coffee bed. When choosing beans day to day, you also need to look at their personality. Some beans are naturally suited to being drunk light and clear, while others only show their mellow richness when brewed strong.

For friends who like a light floral-fruity tea profile and prefer drinking light, Qianjie Sun-Dried Huakui Coffee is a very good match. The large day-night temperature difference at high altitude in Sidamo lets the coffee beans accumulate abundant sugar, naturally carrying ripe tropical fruit aromas of strawberry, mango and citrus. This medium-light roast bean is suited to a slightly larger amount of water to dilute the strength, fully stretching out the captivating floral and fruity aroma, so it drinks like a refreshing freshly squeezed juice.

Also a model of light drinking is Qianjie Washed Gudingding Cooperative Coffee. Ethiopia's high-quality washed processing brings an extremely clean base, with elegant white florals, crisp citrus and green tea notes on entry. If this bean is brewed too strong, the bright fruit acidity easily becomes abrupt, while keeping the strength on the light side instead lets the tea-like feel and sweetness unfold layer by layer, making it especially pleasant to drink at night.

If you prefer a steady, smooth nutty sweetness, Qianjie Yunnan Small-Bean Coffee is very worth trying. Medium roasting gives it aromas of nuts, dark chocolate and caramel, with a faint soft fruit acidity in the finish. It can show a warm, mellow richness at a slightly higher strength, and also withstands the herbal sweet aftertaste brought by light brewing. Its easygoing personality makes it simple for beginners to fine-tune a comfortable taste, which feels very reassuring.

To brew this type of high-altitude low-caffeine bean well, the parameter setup is actually very simple. Prepare 15g of coffee grounds, use a 1:15 coffee-to-water ratio, prepare 225ml of hot water, and keep the water temperature around 90 degrees. Grind to medium-fine, first pour 30ml of water and bloom for 30 seconds to fully awaken the aroma, then do a two-stage pour, keeping the total time to around 2 minutes, and you will get a cup of clear coffee that is sweet and balanced.

Coffee drinkers who like a thick mouthfeel will find that Qianjie Washed Huilan Coffee shows another kind of charm. An altitude of more than 1800 m gives it a full body, with rich hazelnut and toffee aromas. Grinding slightly finer makes the strength a little higher, and the rich oily texture can then coat the mouth. Once you understand the fine-tuning techniques of extraction and strength, whether you prefer fruity or nutty aromas, you can make a satisfying good pour-over late at night.