Why Should Cappuccino Be Filled to 11 Parts Full? What is the Coffee Golden Circle? Does the 1:1:1 Ratio Refer to Milk, Foam, and Coffee?

The Enchanting Name and Story of Cappuccino

Among Italian coffees, the name "cappuccino" stands apart, carrying an exotic charm that captivates many newcomers to coffee culture. Stepping into a coffee shop, beginners often find themselves drawn to this distinctive name on an unfamiliar menu. That choice, though, frequently leads to a bitter experience, leaving many wearing what might be called a mask of suffering from the intensity of the flavor.

The Three Traditional Principles of Cappuccino Making

As we know, every coffee drink has its own preparation method based on its character, and cappuccino is no exception. Through history, three major principles for making cappuccino have circulated widely: first, the preparation ratio should be 1:1:1; second, the cup should be filled to 11 parts full; third, the finished coffee should display a "golden ring."

Most people find these principles confusing. What does 1:1:1 mean? Why fill to 11 parts? What exactly is the golden ring? The confusion is understandable, because cappuccino has undergone several transformations over its hundred-plus-year history. Among the three principles, only the 11-part fill has continued to this day. Still, each principle emerged for its own reason. So today FrontStreet Coffee will share what these three principles mean and where they came from.

The Origins and Evolution of Cappuccino

Although cappuccino and latte belong to the same era of Italian milk coffees, one significant difference stands out: cappuccino was born in Italy itself, making it an Italian milk coffee with a "pure lineage," while latte was not. In fact, cappuccino existed in Italy even before the espresso machine was invented. According to legend, it was originally made from honey, spices, cream, and black coffee, with coffee as the base and cream crowning the top. Because it was served in a glass, the cream left significant white space, much like ice cream, and when topping it off a small peak was deliberately created for visual appeal.

Since the finished coffee's color was dominated by reddish-brown, and combined with the small peak on top, it successfully reminded people of the robes worn by Capuchin friars. Thus this coffee acquired the name "cappuccino," derived from the religious garment name "Capuchin." Later, after the espresso machine was invented, the name was inherited by a new milk coffee based on espresso, and the famous three principles originated from cappuccino during that period.

Understanding the 1:1:1 Ratio

The so-called 1:1:1 refers to the material proportions for making cappuccino: espresso, milk, and foam. Note that this refers not to weight ratios but to volume. It means that at the time, espresso, milk, and foam each occupied one-third of the cup. That proportion was quite reasonable for its era, since coffee machines had just been invented and did not have sufficient pressure for extraction. Increasing the liquid volume was therefore necessary to extract all the flavor compounds from the coffee, which is why the coffee liquid could occupy one-third of the cup.

This approach does not work well today. With 9-bar pressure as the standard, only about 40ml is needed to extract all the compounds that previously required 60ml. If we still made cappuccino using the original proportions, the resulting cup would be very, very small, and because the coffee flavor would be overly prominent, most people would find it unacceptable. Consequently, this method was not passed down through the generations.

The 11-Part Full Tradition

Although coffee machines existed at the time, they did not include steam wands, which meant foam could only be created by hand. Anyone who has tried manually foaming cold milk knows that hand-made foam is very, very thick, because all the milk in the foaming container turns into foam, not just the milk at the surface.

After foaming, people would scoop the foam out with a spoon and place it on already mixed coffee. Following the original cappuccino method, filling the cup past the brim to 11 parts full completed an Italian cappuccino. Because the hand-made foam was quite stiff, it easily formed a small peak as it left the spoon, just like the original version of cappuccino.

Although today's cappuccinos no longer have the small peak, the 11-part full tradition continues to this day. As for why the small peak was abandoned, that has much to do with the origin of the coffee's golden ring.

The Golden Ring Phenomenon

With technological progress, coffee machines with milk-heating capability were finally invented. The new machines not only had more powerful pressure but also brought a convenient tool for heating milk: the steam wand.

The steam wand eliminated the need for separate equipment to heat milk or create foam, dramatically improving both efficiency and quality. Since the foam was created simultaneously with the milk, the resulting foam, while still thick, had better fluidity and a finer, more delicate texture overall. It was no longer as hard and stiff as cake cream, and naturally no longer formed small peaks.

When this thick foam was poured into coffee, its low fluidity pushed aside the oils on the coffee surface and took the center position. Because the outer espresso oils had a golden color and appeared as a circular ring under the foam's pressure, it looked like a golden circle, and the name "coffee golden ring" was born.

In the same way, we rarely see this golden ring on today's cappuccinos, for a simple reason: the birth of latte art. Latte art gave coffee a completely new appearance, and consumers were more willing to pay for coffees with distinctive visual effects. So, not just for lattes but to better attract customers, people applied latte art to cappuccinos as well. The original cappuccino foam was simply too thick and could not be poured, so out of necessity people reduced the foam thickness to create a foundation for latte art patterns.

From this we can see that cappuccino as a product has continually evolved and changed with the times. Although the classic is no longer the same as before, precisely because it has not remained frozen, it has survived to this day, known and loved by us now. FrontStreet Coffee therefore does not advocate unconditionally restoring the traditional recipe according to the three principles just to emphasize classic status. Occasionally making a cup for yourself to experience the former face of coffee, though, is quite pleasant.

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FrontStreet Coffee Recommendation

The thick, rounded foam of a cappuccino is best supported by an espresso blend with real depth. For home brewing, FrontStreet suggests the espresso-machine blends as your first stop. If you are new, try the "crema bomb" FrontStreet Classic Blend or the value pick FrontStreet Black Cocoa Blend. Pulled as 20g of grounds at a 1:2 ratio over 30 seconds, the shot is concentrated enough while still extracting fairly evenly, with a solid flavor and texture.

If you want to push a cappuccino toward floral and fruity, FrontStreet Strawberry Candy Espresso Blend is the first choice, delivering berry, rose, raisin, and fruit-candy aromas. If you prefer a fresher, less bitter cup, FrontStreet Granada Geisha SOE is made with sun-dried processing, and its medium roast brings berry, orange, and persimmon notes that turn into a milk-candy character when paired with milk.

For the drink itself, FrontStreet pulls around 20g of grounds into 40ml of coffee over about 32 seconds and pours it into a warmed cup, steaming the milk a little thicker and fluffier since no latte art is needed. Scoop a spoonful of foam into the center to fill a circle, swirl the pitcher to reintegrate the foam and milk, then pour into the middle of the cup and finish at 11 parts full.