How Does the Three-Pour Method Shape Coffee Extraction?

The three-pour method splits coffee extraction into three stages, controlling how much water goes in and when. A common starting point is 15 grams of coffee at a 1:15 ratio, 88C water, and a medium-coarse grind. Pour 30 grams for the bloom, wait 30 seconds, then add 100 grams, and finish with 95 grams once the bed drops.

Timing the next pour matters: start the second stage at about the 31-second mark and begin the final pour when the liquid level falls by half. The article also suggests dividing the brewed liquid into front, middle, and back segments to taste separately, which helps identify how each stage affects flavor. The example uses Colombia Huila beans.

The three-pour method is a common and practical pouring technique in pour-over coffee, splitting the entire extraction process into three pouring stages, influencing the final flavor by controlling the water volume and timing of each stage. This article uses 15 grams of coffee, a 1:15 coffee-to-water ratio, 88℃ water temperature, and a medium-coarse grind as parameters to break down in detail the brewing process of Front Street Colombia Huila, including the specific operations of a 30-second bloom, a second pour of 100 grams, and a third pour of 95 grams, and answers how to determine the best timing for the next pour. At the same time, the article also shares an experimental method of dividing the coffee liquid into three segments—front, middle, and back—for separate tasting, helping enthusiasts identify the flavor differences of each segment, so as to adjust the pouring ratio and find a taste they are satisfied with.

What is the three-pour brewing method? Simply put, it divides the entire pouring process into three parts, of which the first stage is the bloom pour. This is also a common brewing method used by Front Street Coffee. Taking the brewing of Front Street Colombia Huila coffee beans as an example, the parameters used by Front Street are: 15 grams of coffee powder, a coffee-to-water ratio of 1:15, a water temperature of 88℃, a medium-coarse grind, and a 75% pass rate through a No. 20 standard sieve.

Brewing Process First, do the prep work: warm the dripper and server, grind the coffee, prepare water at the appropriate temperature, then add the coffee grounds. Begin the first pour while starting the timer. Pour 30 grams of hot water in the first stage, circling from the center outward; the coffee grounds absorb the water and gradually expand, forming a plump "coffee burger."

Stop when 30 grams of water has been poured, and wait 30 seconds for the bloom. At the 31st second on the scale, begin the second pour, still circling from the center outward, keeping the stream steady and vertical. When the water column hits the coffee bed, foam is produced; this stage lets the coffee foam release and cover the entire surface of the coffee bed, with the liquid level rising to the base of the short ribs. The pour amount for this stage is 100 grams.

When the liquid level drops by half, begin the final pour, likewise pouring 95 grams from the center outward in an "aroma-seeking" pattern. The originally dark brown foam gradually turns pale yellow, and the liquid level returns to the height it was at during the second pour. After all the coffee liquid has flowed into the server, remove the dripper to end the extraction.

How do you determine the timing for the next pour? The three-pour method has two re-pouring time points, namely the second and third pours. The timing of the second pour is easy to grasp; usually it can be done after a 30-second bloom. The third is harder to judge because there is no fixed time. Front Street generally waits until the water level drops by 1/2 or 2/3 before pouring again.

When the water level drops by 1/2 or 2/3, the dripper will neither hold too much water nor expose the coffee bed because the water level has dropped too low, avoiding uneven extraction between the upper and lower layers of coffee grounds;

After the water level drops, the stream can directly penetrate the standing water to agitate the lower layer of coffee grounds. If the water level is too high, the impact of the water column is insufficient, causing the upper layer of the coffee bed to be over-extracted while the lower layer is under-extracted.

What are the advantages of three-pour extraction? Enhanced coffee flavor: during extraction, the flavor compounds of the coffee can be more fully extracted, enhancing the coffee's layering.

Strong compatibility: it can express the flavor well for most coffees from different origins and with different roast levels;

For the brewer, if too much water is poured at the beginning and the water level is found to rise too quickly, staged pouring can be adopted to lengthen the brewing time and let the water level drop before continuing, avoiding under-extraction caused by too fast a flow.

In fact, staged pouring can also better identify the flavor characteristics of each segment of coffee liquid, so as to adjust the brewing plan. Front Street divides one cup of coffee into three cups—front, middle, and back—compares their respective flavors, and finds a suitable ratio.

Front Street Coffee selected Front Street Colombia Rose Valley for this demonstration, keeping it as consistent as possible with the usual normal pour-over method. The brewing parameters are as follows:

Coffee dose: 20g Coffee-to-water ratio: 1:15 Grind: medium-fine (78% pass rate through a No. 20 standard sieve) Water temperature: 91℃

Also prepare 3 sharing servers of the same specification to make it easier to observe the color of the coffee liquid. This time 20g of coffee is used, so the corresponding pour water amount should be 300g. According to the previous Coffee Lab experiment, 20g of coffee grounds will absorb about 40g of water, so the actual brewed coffee liquid is about 260g, divided evenly into 3 equal portions, about 86.6g each.

Pick up the pour-over kettle and begin the experiment First pour 40g of water for a 30-second bloom. Then tare the scale, pour another 86.6g of water, and after all the coffee liquid has flowed into the server, replace the server and tare the scale; continue pouring 86.6g of water, and after all the coffee liquid has flowed into the server, replace the server and tare the scale; pour the final 86.6g of water, and wait for all the coffee liquid to flow into the server.

In this way we obtain 3 servers of equal amounts of coffee liquid. Observing the color of these three servers, it is obvious that the front, middle, and back segments of coffee liquid go from dark to light, and the concentration also goes from strong to weak.

The following are personal tasting notes for the beans used in this experiment, for reference only: Front segment: concentrated and punchy, sharply acidic, rich Middle segment: soft fruit acidity, honey, cocoa, overall very light Back segment: light as water, sugary water, sweet aftertaste, faint floral aroma

It can be seen that the front segment extracts most of the coffee's flavor, but the concentration is too high to taste the details, and it is overall rather sour; the middle segment is more complex, with acidity, sweetness, and bitterness, with sweetness as the main note; while the back segment is basically watery, water with a slight flavor, yet it highlights the aroma.

Besides tasting each server separately, you can also mix fixed ratios of the front and middle segments, the front and back segments, or all three together to obtain a flavor you are satisfied with, thereby adjusting the pouring ratio. For example, Front Street mixed these three servers in a 1:1:1 ratio, and what emerged was a complete Rose Valley flavor.

What makes this experiment different from normal brewing is that after each pour you must wait for all the coffee liquid to finish flowing before continuing to pour, so the brewing time will be longer. But this method lets you clearly judge the coffee flavor after each pour, thereby adjusting your own pouring distribution plan. In addition to helping formulate a brewing plan, this method can also help you check where the coffee's defective flavors come from. If you brew a bean using your own brewing method and taste a defective flavor, you can use this method to divide it into several servers and find the location of the defective flavor, then make brewing adjustments.

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