Coffees with notes of nuts, cocoa and caramel usually have a familiar sweetness and rounded body, but change the parameters and the cup may end up bitter, or thin. To brew these beans so they taste smooth, the key is not to copy a fixed set of numbers, but to first judge whether they are better suited to highlighting sweetness and body, or to preserving more bright aroma.

For pour-over, you can start with a medium dose to establish a reference, for example 15 g of coffee to 225 g of water, a ratio close to 1:15. Start with a water temperature of 91°C, pour in two or three stages, and keep the total time between 2 minutes 30 seconds and 3 minutes. This range allows the nut and cocoa aromas to develop fairly fully without easily pulling out dry bitterness in the finish.

If the brewed coffee tastes sharply acidic with little sweetness, it usually means the solubles were not extracted enough, so you can grind one step finer, or raise the water temperature by 1°C to 2°C. If it tastes astringent on the palate and has a roasted sensation in the throat, do the opposite: grind slightly coarser, reduce the time spent in the later stages, and avoid repeatedly stirring the coffee bed while pouring.

The pouring rhythm also changes the mouthfeel. For a fuller body, keep a steady stream in the early pours so the coffee bed is fully saturated, then slow the flow in the later stages to extend contact. If you want the cocoa aroma to be clearer and the body lighter, reduce agitation and use gentler circular pours, so the fines do not take too much part in extraction.

Qianjie Papua New Guinea Bird of Paradise is well suited to practising this approach. Its acidity is not very prominent, and overall it has a soft sweetness and a clean texture. For pour-over, use 90°C to 91°C, a 1:15 ratio, and a slightly medium-fine grind. If you find the flavour a little weak, reduce the water to 210 g; if the finish feels dry, adjust the grind coarser first.

For espresso with this bean, you can start with 18 g of coffee and 34 g to 38 g of yield, an extraction time of 27 seconds to 32 seconds, and pressure kept at around 9 bar. Rather than always chasing a long extraction, moderately shortening the liquid weight better preserves the cocoa and nut character. The grind needs to be fine enough, but judge by whether the flow is even, not just by whether the coffee bed looks clumpy.

If the espresso tastes sharp or clearly green and astringent, grind a little finer so the water and coffee make fuller contact; if it turns charred and bitter with a dry tongue, first reduce the yield by a few grams, or grind coarser. There is no need to change the pressure often; once it is stable in the usual working range, look for the sweet spot mainly through grind and liquid weight.

To make a latte with Bird of Paradise, it is best to keep the coffee liquid at a fairly high strength, then pair it with about 150 g of steamed milk. Keeping the milk temperature between 55°C and 65°C lets the coffee's nutty sweetness connect with the creamy texture. If the milk flavour covers the coffee, reduce the amount of milk; if the whole cup feels heavy, increase the yield by a few grams to open up the layers in the cup.

If you like a nutty chocolate base but do not want to give up fruit aromas entirely, try Qianjie Colombia Sidra. Its aroma leans more towards ripe fruit and juice, and for pour-over it suits a ratio of about 1:16 at 90°C to 92°C, with a slightly coarser grind than Bird of Paradise and gentle pouring. For iced pour-over, increase the dose or reduce the ice so the flavour does not seem too thin once chilled.

When choosing beans, you can treat the parameters as flavour amplifiers: for a rounded cocoa character, start with a lower water temperature, moderate strength and not too much agitation; for brighter fruit aromas, raise the water temperature or loosen the ratio. For espresso, adjust strength around liquid weight, grind and time. Once you find a starting point that suits you, record each change, and the nut and chocolate flavours will be easier to present consistently.