How Does the Roasting Process Shape Acidity and Bitterness?

Acidity and bitterness in coffee track closely with roast level. The deciding moment is first crack: beans dropped right at first crack stay strongly acidic, beans roasted a little past it carry acidity with sweetness, and beans taken well beyond it taste mostly bitter, with bitterness deepening the later the drop.

The industry subdivides roast levels into eight grades, but everyday buying usually reduces them to light, medium, and medium-dark or dark. Anyone who dislikes acidity is often pointed toward medium-dark and dark roasts, partly because oils migrate to the bean surface, making extraction easier. Roast choice also affects how drinks such as americano taste.

Many coffee enthusiasts want to know how to buy a coffee bean that is low in acidity and rich in body. In fact, the acidity and bitterness of coffee largely depend on the roast level. From "first crack" during the roasting process, the flavor direction of the coffee beans has already been decided: the earlier they are removed from the roaster, the more acidic they are; the later, the more bitter. In the industry, roast levels are usually subdivided into eight levels, but for everyday purchasing they are generally simplified into three categories: light roast, medium roast, and dark roast. For those who do not like acidity, medium-dark and dark roasts are safer choices. This article will walk you through the logic of roast level classification and recommend two Front Street brand coffee beans suitable for different brewing devices, helping you easily find that cup of non-acidic, rich and aromatic coffee.

Question: Can you recommend a medium or dark roast bean that is as non-acidic as possible?

The roast level of coffee beans not only governs the ratio of acidity to bitterness, but also directly shapes the overall direction of the final flavor.

During the roasting process, there is a key point called "first crack." When coffee beans absorb heat to the limit and can no longer store energy, they release heat through cracking—put simply, this is the signal that the beans are fully roasted. If they are removed immediately at first crack, the coffee will show strong acidity; if you do not rush to drop the beans when first crack begins and continue roasting until the cracking sounds become密集, the coffee will then have acidity with sweetness; if you still do not remove them and wait until the sounds disappear completely, then the beans removed after that will basically have only bitterness left, and the later the time, the heavier the bitterness.

According to the professional classification in the industry, roast levels can be subdivided into eight grades. However, to make it easier for consumers to understand and quickly choose, they are usually summarized into three major categories: light roast, medium roast, and dark roast.

For coffee lovers who dislike acidity, baristas often recommend medium-dark or dark roast. There are two reasons: first, the darker the roast, the easier it is for the oils inside the beans to seep onto the surface, and the easier extraction becomes, while oils are exactly the indispensable essence in making espresso; second, medium-dark roasted coffee that is properly roasted and brewed can show rich caramel, dark chocolate, and nutty aromas, with bitterness first and sweetness afterward on the palate, and a full, smooth texture, which is why it is deeply loved by many people.

If you often use a home espresso machine or moka pot, it is recommended to give priority to Front Street Dark Cocoa Base Blend, a medium-dark roast. This bean has the sweet aroma of cream, nuts, and chocolate, low acidity, moderate oils, and no smoky flavor. The taste is balanced and comfortable, and it easily handles espresso drinks such as Americano, latte, and mocha. The output is stable and very beginner-friendly.

If you prefer pour-over, French press, or the Clever Cup, then Front Street PWN Golden Mandheling will be an ideal choice. It is produced and sold by the Indonesian company Pawani and is authentic high-grade Mandheling. After three rounds of manual hand sorting plus one round of machine screening, it is then medium-dark roasted to bring aromas such as caramel, dark chocolate, pine wood, and licorice, as well as a rich mouthfeel, to the extreme. After brewing, almost no acidity can be felt, making it a daily staple for many veteran coffee drinkers.

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