Blending coffee beans means mixing single-origin beans from different regions in a certain proportion, allowing their respective strengths to complement or reinforce each other, thereby achieving a more balanced and stable flavor performance. This practice is especially common in espresso, where drinks such as Espresso, Americano, Latte, and Cappuccino are mostly based on blended beans. Blending can be done either by mixing green beans before roasting or by roasting each separately and then blending; the specific choice depends on the characteristics of each bean in the recipe. This article focuses on the basic logic of blending, and in combination with Front Street Coffee's three espresso blend formulas—Specialty Blend, Commercial Espresso Blend, and Basic Espresso Blend—introduces the flavor characteristics of the origin beans used, the roasting approach, and the final presentation, while also sharing the principle of primary-secondary pairing in blending, to help coffee enthusiasts and shop owners find a suitable balance between flavor and cost.

Blended coffee, also called mixed coffee, is made by combining several single-origin coffee beans in proportion so that each bean's strengths can be brought into play. Blended beans are usually composed of coffee beans from different origins, with the goal of achieving a more balanced taste. For example, if one bean is smooth in mouthfeel but lacks aroma, it can be paired with a bean with a prominent aroma, allowing their strengths and weaknesses to offset each other; in flavor they may either complement or stack, ultimately forming a new taste with richer layers. There are two timing options for blending: mixing green beans first and then roasting, called green blending; or roasting separately first and then mixing, called roasted blending.

Whether pre-mixing green beans or roasting separately and then blending, the decision must be based on the specific characteristics of the coffee beans in the formula; both methods have their own suitable scenarios. The advantage of roasted blending is that different roast levels can be given to each bean, allowing every component to perform at its best.

Before starting to formulate a blend, it is necessary to first understand the flavor differences of coffee from various regions around the world, as beans show different characteristics depending on origin. Different varieties and origins give coffee beans different personalities, with subtle differences in dimensions such as acidity, bitterness, sweetness, aroma, and body, while single-origin coffee often focuses more on showcasing the unique style of a certain type of coffee. Blended beans are mostly used for espresso drinks such as Espresso, Americano, Latte, and Cappuccino; the taste is more balanced, smoother, and more stable, and can be said to lean more toward mass appeal.

So, how exactly do we blend?

(1) Front Street Specialty Blend Coffee Beans: Colombia : Brazil

Colombia Huila Region

Huila is located in southwestern Colombia and is one of the country's main coffee-growing regions. Colombian coffee is generally grown at an altitude of 1,500-1,800 meters, mostly with Bourbon and Caturra varieties, using the washed processing method, with relatively high density, uniform bean size, and plump bean shape (the distance from the center to the surface of the bean is relatively thick). Because many well-known coffee-growing areas are distributed within the Huila region, the names of various small areas gradually circulated as brand names. Although the growing conditions in this region are quite ideal, the infrastructure of coffee farms and their surroundings is not yet well developed, and green bean drying equipment or washed processing facilities are still incomplete, which is somewhat regrettable. Huila coffee has a strong taste and a relatively heavy texture; in particular, its aromas of nuts, chocolate, and caramel, along with suitable acidity, make it a high-grade specialty coffee.

Flavor characteristics: rich and solid mouthfeel, pleasant acidity, fragrant and mellow aroma, moderate acidity, and rich sweetness that is thought-provoking. Because it is inexpensive and the beans are relatively small, it is suitable for blending mixed coffee. The coffee has a strong taste and a relatively heavy texture. Its aromas of nuts, chocolate, and caramel, along with suitable acidity, make it a high-grade specialty coffee, suitable as a single origin or as an espresso blend base.

Brazil Cerrado Region

Brazilian coffee is generally grown at an altitude of 1,000-1,300 meters, with relatively low density. The variety is mostly Bourbon, using the semi-washed process. The moisture content is moderate, the bean texture is relatively soft, and the thickness from the bean surface to the center is relatively thin, so it is not suitable to be roasted at too high a temperature; otherwise, the temperature of the roaster drum's inner wall will scald the bean surface and produce a burnt bitter taste;

At the same time, if we want to express the characteristics of nuts, milk chocolate, and better body, and use it as a blend base, we adopt the method of dropping the beans at medium heat, maintaining the heat until the dehydration stage, and after the start of first crack, making slight adjustments as the temperature rises to promote a more complete caramelization reaction; when the temperature rises to near second crack, the beans can be discharged.

Flavor characteristics: a comfortable sweet-bitter taste, extremely smooth on entry; with a faint grassy aroma, fragrant with a slight bitterness; sweet and smooth, with a lingering aftertaste that is pleasant;

Flavor after blending: a sweet and fragrant mouthfeel. Using a medium-dark roast, when making espresso, the taste has a soft slight acidity, clean sweetness, and a nutty sweet aftertaste; the overall impression is not too stimulating,平和, with a medium amount of crema, meeting the daily output needs of coffee shops.

(2) Front Street Commercial Espresso Blend Beans: Colombia : Brazil : Robusta

[Robusta] beans have strong resistance to pests and diseases and high yield. They are usually less acidic than Arabica beans and often carry a slight woody aroma. Their caffeine content is 2.2%, higher than Arabica beans' 1.2%, and their chlorogenic acid content is also relatively high; they are also quite bitter and are usually used in commercial beans, with a lower cost than Arabica beans.

In terms of the flavor of a single bean, the coffee obtained from commercial beans is much inferior to that from specialty coffee beans. Generally, commercial beans are chosen for blending; through blending, coffee with a very good taste can also be made, and it can be used for lattes, cappuccinos, and other espresso drinks. For our commercial blend used to make Espresso, because it contains Robusta beans, the crema will be richer; the taste is classic, with caramel sweetness, flavors of nuts, cocoa, and dark chocolate, balanced acidity and sweetness, and a slight sweet bitterness, with a lasting aftertaste, suitable for the daily output of coffee shops.

(3) Front Street Basic Espresso Blend Coffee Beans: Yunnan AA : Brazil;

Our Yunnan AA is [Typica], the oldest native variety from Ethiopia, originating in Ethiopia and southeastern Sudan; all Arabica varieties are derived from Typica. The top leaves are copper-red, so it is called red-top coffee. The flavor is elegant, but the plant is relatively weak, has poor disease resistance, is prone to leaf rust, and produces little fruit. Typica has four slender branches, spreading outward, with an inclination angle of 50~70 degrees. The opposite leaves are long oval-shaped, with smooth surfaces; the branches at the ends are very long and have few branches, while the flowers are white and bloom at the base where the leaf stalk connects to the branch. Ripe coffee cherries look like cherries and are bright red.

During cultivation, it needs more shade, and it can usually be harvested only about once every two years. Yunnan's high-quality geographical and climatic conditions provide good conditions for coffee growth; the planting areas include Lincang, Baoshan, Simao, Xishuangbanna, Dehong, and other prefectures. Yunnan's natural conditions are very similar to Colombia's: high altitude and large temperature difference between day and night. Its flavor is of the mellow-aroma type, with moderate acidity, a fragrant, rich, and full-bodied taste, uniform beans, high oil content, and fruity aroma; its quality and mouthfeel are similar to Colombian coffee.

Blend flavor: with soft fruit acidity, caramel sweetness, nutty and dark chocolate flavors, smooth and viscous, but the taste is on the lighter side. This cost-effective espresso blend bean is suitable for shop owners and home users who prioritize cost and have average flavor requirements.

When blending, there must be a distinction between primary and secondary components in order to create a more wonderful taste than single-origin coffee. Before formulating a blend plan, first envision a relatively suitable combination method, then blend after appropriate roasting, and determine the best plan through cupping and later adjustments. Hope this helps everyone~

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