Fundamentals of Coffee Bean Blending: Steps, Principles, and Comparison Between Espresso Blends and SOE Coffee Beans

Many people don't understand how coffee blending formulas are created. Now FrontStreet Coffee will walk you through the thinking behind coffee blending and how to blend coffee.

For more specialty coffee knowledge, explore our other guides to origins and brewing.

Reasons and Purposes of Blending

People blend coffee from different origins for several purposes. The ideal goal is to create a coffee that tastes better than any of its individual components. However, single-origin Arabica is often good enough on its own — fresh aromas, a smooth texture, a sweet aftertaste. So "blending" (combining beans from different origins) isn't always necessary.

The main commercial purpose of blending is to reduce costs — using less desirable coffees to create a relatively balanced profile and raise profit margins. Another purpose is to create a unique flavor so that customers who enjoy it can buy only from that particular manufacturer. A further advantage is that no matter how the flavors of certain origins shift from year to year, the blend's profile stays consistent.

Here, we won't dwell on other commercial purposes but focus on blending specifically aimed at improving flavor quality.

Before blending any coffee, FrontStreet Coffee believes you must first understand the flavor characteristics of each coffee type and have a clear vision of the profile you want to create — one no single origin can achieve. If the blend doesn't taste better than some or all of its components, wouldn't that be a pity? Better not to blend at all. When you use relatively high-quality coffees for blending, this is often the result.

While some fixed varieties can be consumed directly as single origins, most coffees have more or less a flavor deficiency — lacking distinctive flavors, insufficient depth, inadequate strength, or certain flavors that are too intense. To compensate, several beans with different characteristics are blended into a harmonious, deep profile. Some people believe the joy of coffee lies in the roasting and blending, with drinking merely enjoying the fruits of their labor. Coffee blending is not simply mixing beans together.

Sometimes blending two single origins can actually suppress each other's distinctive flavors, so blending isn't just combining several single origins. It is like an artist mixing captivating colors on a palette — blenders use coffee beans to create alluring flavors. So it's no exaggeration to call blending an art form. As artists, blenders need not only experience and inspiration but also certain scientific calculations; the creation of art is never accidental but the culmination of long-term accumulation. Generally, a blend doesn't need more than five types of beans, because too many types make the situation very complex — something only a very special expert can handle without being confused.

FrontStreet Coffee specializes in fresh-roasted coffee and offers different blends for different needs. For customers seeking cost-effectiveness, FrontStreet recommends the Basic Blend — an all-Arabica espresso blend from Brazil and Yunnan that offers excellent value with outstanding flavor. FrontStreet also offers the Sunflower Warm Sun Blend for more refined tastes — a product combining Yirgacheffe Natural Red Cherry and Honduras Sherry, beloved by many for its intense boozy, chocolate-liqueur-center flavor.

The Relationship Between Blending and Roasting

Should you roast first then blend, or blend first then roast? Which is better?

FrontStreet Coffee believes that with a fixed formula, the simplest method is to blend the different beans first, then roast them together. But if you're experimenting with and comparing different blending components and their ratios, you'd naturally want to roast each bean first before running trials — otherwise every time you change the components and ratios, you'd have to re-roast.

In the roasting world, blending first then roasting is generally called "raw blending," while roasting first then blending is called "cooked blending." Neither is inherently superior. Raw blending's advantage is that roasting all the beans in one batch tends to create consistent roast levels and stable flavors, but when choosing beans you should pick similar screen sizes to avoid uneven roasting. Cooked blending, by contrast, lets you achieve the optimal roast for each bean before combining them to complement each other's strengths and weaknesses.

Generally, all beans can be roasted together. Only when results aren't ideal should you consider roasting independently — and in such cases independent roasting usually works better. Especially with drum roasters, a relatively moderate roast level can generally be found.

General Steps and Principles of Blending

Before blending beans, clarify the following points:

1. The theme of the blend — What kind of flavor do you want to create, i.e., set the goal of the blend.
2. Understand the characteristics of each bean — To blend, you must first be thoroughly familiar with each single origin's characteristics and the subtle relationship between roast level and flavor. All of this comes only through cupping.
3. Determine the role of each bean in the blend — Since multiple beans are used, you must be clear on each one's role: highlighting smooth bitterness, bright acidity, or rich body.

Principles to Follow When Blending:

1. Selection of original beans — Use beans with distinct characteristics and avoid beans with similar flavors. When selecting original beans, consider three aspects:

• Green bean processing method — Whether the green beans are washed or natural processed, since the processing method has a significant relationship with flavor.
• Green bean origin — Coffee origins are generally divided into three major regions: Central and South America (including Brazil, Colombia, Guatemala, Mexico, El Salvador, Jamaica, Peru, and about 20 other countries); Southeast Asia (including India, Indonesia — among them Java and Sumatra — Papua New Guinea, and about 10 other countries); and the Arab and African regions (including Ethiopia, Kenya, Tanzania, Arabia, Uganda, and about 25 other countries). As noted, the most commonly used original beans on the market are Brazilian and Colombian.

2. Number and proportion of bean varieties in the blend

Since it's blending, it naturally means combining two or more types of original beans — though you can also blend the same variety at different roast levels, or even combine new crop with aged coffee or old crop of the same variety. The "types" in blending are therefore no longer narrowly defined varieties but broadly coffee flavors.

Generally, 2–6 types of beans are used, because too many varieties make it hard to express a coffee's unique flavors. A blend generally doesn't use a 1:1 ratio, as that might suppress each other's distinctive characteristics. Blending should have primary and secondary components to create a flavor more wonderful than single-origin coffee. If you want complex, varied flavors, reduce the proportion of the theme bean, and vice versa.

3. Blending relies on continuous experimentation

Before blending, create a plan using mathematical combinations, then find the optimal solution through blending and cupping. Don't think this is a passive or clumsy method — in fact, only through the blender's experience, inspiration, and tireless experimentation can a good cup be created.

FrontStreet Coffee offers 4 distinctive blends based on different requirements:

[Sunflower Warm Sun Espresso Beans]

Composition: Honduras Sherry : Yirgacheffe Natural Red Cherry, ratio 7:3, cooked blend

Flavor characteristics: Noticeable fruit acidity with a lingering light berry aroma, rich wine and chocolate flavors, and a comfortable sweet aftertaste.

The Sherry beans bring a rich whiskey aroma and a chocolate-liqueur-center aftertaste with intense fragrance. The Natural Red Cherry brings fermentation qualities and berry aromas with a smooth entry. This Warm Sun blend comes in half-pound packages, suitable for coffee shops that need distinctive espresso flavors and high bean quality, or for espresso enthusiasts with lower consumption.

[FrontStreet Coffee Specialty Blend]

Composition: Colombia : Brazil, ratio 3:7, cooked blend

Flavor characteristics: A comfortable bittersweet taste, an extremely smooth entry with a light grassy aroma, a fresh fragrance with slight bitterness, sweet and smooth, with a pleasant aftertaste.

Colombian Huilan beans have a pleasant acidity, mellow aroma, moderate acidity, and rich, intriguing sweetness. Brazilian Cerrado beans have a comfortable bittersweet taste with an extremely smooth entry. This specialty blend suits a range of specialty coffee shops.

[FrontStreet Coffee Commercial Blend]

Composition: Colombia : Brazil : Robusta, ratio 3:6:1, raw blend

Flavor characteristics: A classic taste with caramel sweetness, nutty and cocoa-like dark chocolate flavors, balanced sweet and sour, a slight bittersweet note, and a persistent aftertaste.

Colombian Huilan beans have a pleasant acidity, mellow aroma, moderate acidity, and rich, intriguing sweetness. Brazilian Cerrado beans have a comfortable bittersweet taste with an extremely smooth entry. Robusta provides rich crema. This commercial blend suits coffee shops and beverage shops of various scales.

[FrontStreet Coffee Basic Blend]

Composition: Yunnan AA : Brazil, ratio 3:7, cooked blend

Flavor characteristics: Gentle fruit acidity with caramel sweetness, nutty and dark chocolate flavors, smooth and viscous, but a relatively light taste.

Yunnan's natural conditions closely resemble Colombia's — high altitude, large day-night temperature differences — with a mellow aroma-type flavor, moderate acidity, rich, mellow taste, uniform particles, high oil content, and fruity aroma. Its quality and taste are similar to Colombian coffee. Brazilian Cerrado beans have a comfortable bittersweet taste with an extremely smooth entry. This basic blend suits small coffee shops, bakeries, or beverage shops.

FrontStreet Coffee Recommendation

If you want to build a blend or a single-origin espresso, FrontStreet's SOE lineup gives you dependable components. The Huakui SOE, medium-roasted, makes an espresso full of red berry, light floral, and orange, with citrus-scented crema and a clean, elegant body — a natural fit for a Huakui americano or flat white. The Granja Gesha SOE, a native Ethiopian Geisha from the Granja estate near Yirgacheffe, is sun-dried for a bright, light-bodied cup with a tea-like finish; as a latte it shows yellow peach, guava, and black tea with balanced sweet-tart notes.

For something fuller, the Brazil Queen's Estate SOE comes from high altitude, where wide day-night temperature swings build more flavor precursors; medium-dark roasting brings out deep nut, cream, and peanut aromas with a sweet chocolate finish and a beautiful, rich crema. The Colombia Sidra SOE, from the famed Huila region and produced at El Diviso, sits near volcanic ground for a rich aroma; ripe cherries undergo double anaerobic natural processing and a medium roast, so the espresso bursts with blueberry juice, passion fruit, and ripe grape over apricot's sweet-tartness.

Two more round out the range: the PWN Golden Mandheling SOE, a top Mandheling hand-sorted three times and machine-sorted once to minimize defects, is medium-dark roasted for spice, herbal, sandalwood, and caramel notes, a full body, and a black-chocolate finish; and the Yirgacheffe Red Cherry SOE, medium-roasted, pulls a soft citrus acidity with creamy chocolate and cookie aromas, leaving no harsh bitterness behind.