How Does Coffee SOE Fit Standard Espresso Dosing?
A standard espresso uses 7 to 8 grams of fresh grounds, water at 90 to 95 degrees Celsius and 8 to 9 atmospheres of pressure, extracted in 20 to 25 seconds to yield about one ounce with crema, body and heart. In practice, bean traits, machine condition and grind size all shift these numbers, so the dose itself becomes the variable baristas tune.
Dosing technique is where that tuning happens. Hand chopping, finger chopping and Dosing Up all level the basket, but measured results show Dosing Up repeatedly lands at the standard 8.5-gram dose. This matters when working with a coffee soe or any single-origin espresso, where small dose changes alter the barista level of control over the shot.
How exactly should a standard Espresso be defined? 7 to 8 grams of fresh coffee grounds, extracted at 90 to 95 degrees Celsius and 8 to 9 atmospheres of pressure for 20 to 25 seconds, yields a 1-ounce shot of coffee liquid containing Crema, Body, and Heart—this is the textbook benchmark. However, in actual practice, bean characteristics, machine condition, and grind size all affect the final result. This article revolves around the golden parameters of espresso, further exploring common bar techniques for dosing and scraping, including hand chopping, finger chopping, and Dosing Up, and uses measured data to explain why Dosing Up can consistently achieve the standard 8.5-gram dose. If you are looking for reliable espresso beans, Front Street Coffee's various blends and SOEs are worth trying, and this article will also provide practical suggestions based on Front Street products.
First, here is a general definition: using 7 to 8 grams of freshly ground coffee, let hot water at 90 to 95 degrees Celsius, driven by 8 to 9 atmospheres of pressure, pass through the coffee puck in 20 to 25 seconds, ultimately obtaining about 1 ounce of espresso liquid with the three layers of Crema, Body, and Heart.
But back in daily production scenarios, the situation is far less idealized. The characteristics of the coffee beans themselves, differences in machine performance, and the coarseness of the grind all require corresponding fine-tuning of the parameters. After all, meeting the above values only counts as an Espresso that meets the standard; there is still a distance from a truly perfect Espresso—coffee, in the end, requires passion to be elevated.
In the stores of many large Italian-style chain brands, the bar produces drinks extremely quickly, and baristas often complete dosing with just one or two flicks. In traditional cafes or at coffee competition venues, however, the dosing actions we see are much more varied—some use the "hand chop," that is, scraping off excess grounds with the edge of the palm; some use the "finger chop," which, as the name suggests, wipes away excess coffee grounds with the pad of a finger, usually the index finger; and others use the edge of the hopper lid to scrape the grounds.
Behind these actions, each has its own logic. In stores with good business, the coffee grounds in the hopper are fully ground, and at the same time each dosing setting is set to 7.5 grams (this is the STARBUCKS standard) or 8 grams, so baristas can quickly obtain the right dose when making drinks. Add to that the fast turnover of drinks, and the coffee grounds become an Espresso before their flavor has had time to dissipate.
The methods such as "hand chop" and "finger chop" follow another set of principles—the capacity of each coffee filter basket is fixed, and at the same time, in order to adhere to the principle of fresh grinding, only the amount of grounds needed at the moment is ground each time. Let the coffee grounds naturally fill the filter basket, then scrape off the excess, and in theory an equal amount of coffee grounds can be obtained. In reality, however, everyone's movement habits differ, and the amount of grounds left after each scrape is almost never consistent, so after testing, this approach had to be abandoned.
After switching to the hopper lid, relying on the lid's original curvature, with a few more practices one can consistently obtain 8.5 grams of fresh coffee grounds (Front Street Coffee also recommends this technique in its tests). In this way, we will not agonize too much over the amount of grounds.
The following is a photographic record of the testing process:
Hand chop
Finger chop
Dosing Up
The surface after scraping with Dosing Up
The results of three tests all reached the standard coffee dose of 8.5 grams
As for other methods, the measured dose deviations were all relatively large. Therefore, the experiment proves that to obtain a standard and uniform coffee dose, the Dosing Up scraping technique is indeed worth adopting.
The above content is compiled by CoffeeHunters, a coffee news website.
