Four Basic Principles of Blended Coffee Beans - The Biggest Difference Between Pour-Over Single-Origin Coffee Beans and Blended Coffee Beans

FrontStreet Coffee has its own perspective on coffee bean blending — we offer a new-style blend called the Sunflower Warm Sun Blend, built from premium coffee of two different origins and suitable for pour-over brewing. Creating a blended coffee might sound easy — just mix the beans together — but the resulting flavor profile must be distinctive enough to become a unique signature. Blending principles, flavor characteristics, and selling points all need to be considered; otherwise, launching an ordinary blend is mere self-indulgence. FrontStreet Coffee believes that good blended beans must have their own character, or they will hold no competitiveness in the industry.

What Is Single-Origin Coffee?

Single-origin coffee refers to coffee produced from a specific origin, region, or plantation, carrying unique flavors that reflect the local terroir. An example is FrontStreet Coffee's Flower Queen (Huakui) coffee, which comes from Flower Queen beans of the Guji Buku processing plant in Yirgacheffe, Sidamo, Ethiopia. During procurement, single-origin buyers can inspect the quality of each batch of green coffee. In fact, the definition of single-origin coffee is quite vague, because there is no authoritative international standard. The common standards fall into four categories: single region, single variety, single batch, and single processing method.

Some might ask: are different varieties harvested from a single region still considered single-origin beans? FrontStreet Coffee can tell you definitively that they are. Ethiopian coffee varieties are extremely complex, and most are mixed lots of different varieties planted and harvested together — which is exactly why Ethiopian beans vary so much in size. What about mixing beans of the same single region and single variety but processed by different methods? That also counts as single-origin coffee. FrontStreet Coffee recently acquired beans from El Salvador's Chocolate Lover Estate: Bourbon coffee from the same estate, with 50% washed processing and 50% black honey processing, aiming to express the chocolate character of the region. Because it all comes from one estate, this bean is a single-origin coffee.

What Is Blended Coffee?

Blended coffee — also known simply as a blend — is a mixture of various single-origin beans that leverages the strengths of each component. Blended coffee beans combine beans from different origins to create a more balanced flavor profile: if one bean is smooth but lacks aroma, a more aromatic bean is added. By taking the advantages of individual beans and complementing each other's strengths and weaknesses — either filling gaps or amplifying — we create a new, richer taste experience. Sometimes the beans are mixed first and then roasted; this is called green blending. Sometimes the beans are roasted first and then mixed; this is called roasted blending. FrontStreet Coffee's roasters use medium-dark roasting to ensure the flavor stability of blended coffee.

Four Principles of Espresso Bean Blending

(1) FrontStreet Coffee's Purpose for Blended Coffee Beans

1. Cost Reduction: Some coffee shops mix lower-quality beans with higher-quality ones to reduce costs and increase profit margins.

2. Stable Flavor: Coffee is an agricultural product, and even the same bean will taste different from year to year. Mixing several types of beans solves this problem well, keeping the taste basically consistent year after year.

3. Create Flavors That Single-Origin Beans Cannot Produce: A coffee bean from a single origin, like a person, has both strengths and weaknesses. Blending is like organizing a team — taking each member's strengths to compensate for others' weaknesses, achieving a complementary effect.

4. Balance Flavor: Espresso machines amplify the most prominent flavor characteristic of the beans. We almost never use a single variety to make espresso, because if that bean is quite bitter, the espresso will be exceptionally bitter; if it leans acidic, the shot will be very sour. Blending lets us balance the various flavors.

(2) Determine the Target Flavor

Once the purpose is set, the next step is to identify the target flavor profile of the blend. Only with a clear objective do you know where to start — and it puts a real test on the blender's understanding of existing beans and regional flavor characteristics. Take FrontStreet Coffee's Warm Sun Blend, created for espresso. When we first designed it, we wanted an unconventional, distinctive espresso with a wine-like aroma, so we used Honduras Sherry beans fermented in whiskey barrels to provide the wine note, plus natural-processed Ethiopian Red Cherry beans to provide acidity and fermentation notes.

(3) Determine the Blending Type

As mentioned, there are green blending and roasted blending. What are the pros and cons of each? FrontStreet Coffee believes the advantages of green blending include using the same roast degree, which makes the coffee more uniform and stable; it also reduces roasting workload — one roasting session suffices, improving efficiency. A single roast degree also greatly reduces quality-control difficulty (one roast means only one degassing date to track, whereas roasted blending can easily leave components with different roast dates, causing flavor differences). However, the disadvantages of green blending are obvious too: it has significant limitations and generally suits beans of similar density. Mixing a bean suited to light roasting with one suited to dark roasting and roasting them together can easily produce a 1+1<2 result.

FrontStreet Coffee believes the advantage of roasted blending is that each component can be roasted to its optimal degree, maximizing each bean's character. The disadvantage is that daily quality control and management become harder: inconsistent roast dates mean tracking more degassing periods. Imagine roasted blending with 4–5 different beans — the product would require attention to 4–5 different roast dates. When FrontStreet Coffee roasts the Warm Sun Blend, we use roasted blending, roasting the Honduras Sherry barrel beans and the natural Yirgacheffe red cherry separately, to maximize the wine aroma of the sherry-barrel beans while preserving as much as possible of the fruity acidity and citrus-berry aromatics of the natural Yirgacheffe.

(4) Determine the Blending Ratio

First comes the flavor and quality of the candidate beans. Before blending, you must confirm that the coffee quality meets standards and understand the flavor differences among components — a crucial step for creating a premium blend. Second is preliminary ratio confirmation: extract the components, mix the coffee liquid at different ratios, design several candidate schemes, and confirm the optimal range through cupping.

Final confirmation involves roasting the range identified in the preliminary stage according to the blending type chosen in step three (green or roasted blending), then tasting directly using the extraction method of the final product. For the FrontStreet Coffee Warm Sun Blend, to highlight the wine aroma in espresso, the whiskey-barrel Sherry beans account for 60% of the blend, while the natural red cherry — adding smoothness, fermentation notes, and acidity — accounts for 40%.

How Does FrontStreet Coffee Pour Over Single-Origin Coffee Beans?

This time, FrontStreet Coffee uses natural-processed red cherry beans from Yirgacheffe, Ethiopia, for the brewing demonstration.

Region: Yirgacheffe, Ethiopia

Altitude: 1,700–2,200m

Processing: Natural

Variety: Ethiopian native varieties

To highlight the berry acidity, fermentation notes, and sweetness brought by natural processing, FrontStreet Coffee brews this bean with a V60 dripper.

Ratio: 1:15

Grind size: medium-fine (80% pass-through rate on a #20 sieve)

Water temperature: 90–91°C

FrontStreet Coffee uses segmented extraction, also called three-stage brewing: bloom with 30g of water for 30 seconds, then pour in small circles up to 125g and pause; when the water level is about to expose the coffee bed, continue pouring to 225g and stop. When the bed is about to be exposed again, remove the dripper (timing starts from the bloom). Extraction time is 1'55"–2'05".

Brewing flavors: lemon, licorice, citrus, berries, sweet orange, with overall high sweetness. The aftertaste carries caramel and cream, with a tea-like aroma in the finish.

How Does FrontStreet Coffee Extract Espresso?

This time, FrontStreet Coffee uses the Warm Sun Blend for the espresso extraction demonstration.

Coffee dose: 19g

Espresso yield: 40g

Extraction time: 30 seconds

Grind size: Feima 900N #2

Flavors: smooth texture, with distinct fruity acidity and a subtle berry aroma on entry, a whiskey fragrance and rich chocolate flavor, and a noticeable sweet aftertaste.

FrontStreet Coffee Recommendation

If this article's Yirgacheffe red cherry has caught your attention, it is worth knowing that Yirgacheffe — a small town in Ethiopia's Sidamo region at roughly 1,700–2,100 meters, with coffee planted above 1,800 meters — is one of the highest coffee regions on earth, so famous that in 2010 the Ethiopian Commodity Exchange made it a standalone designation separate from Sidamo.

FrontStreet Coffee's washed Yirgacheffe everyday coffee is the classic starting point: white jasmine, bright citrus and lemon acidity, and a tea-like finish at an accessible price — the go-to first bean for anyone entering specialty coffee. For a more refined washed cup, the FrontStreet Gedingding Cooperative coffee from the Worka area is processessed in the most traditional washed style, delivering fresh, bright citrus and lemon acidity with jasmine fragrance and none of the conventional bitterness. And if you prefer the natural route, the FrontStreet Red Cherry — the same fully-ripe, sun-dried lot featured in the brewing demo above — pairs typical Yirgacheffe character with the tropical fruit aroma of natural processing: citrus acidity, berry juiciness, honeyed sweetness, and a creamy smoothness.