Coffee Latte Art Milk Froth Techniques How to Froth Milk Why Can't Push Through Espresso Bean Variety Recommendations

Walk into any coffee shop and chances are you will order an espresso-based drink — a latte, a cappuccino, an Americano, and the like. Each has its own character: the seamless marriage of coffee and milk in a latte, the thick foam cap of a cappuccino, the light, delicate body of a flat white. In this article, FrontStreet Coffee shares the essentials of making espresso-based drinks.

A fragrant, delicious specialty coffee needs two ingredients: espresso and frothed milk. Mixed in different proportions and sequences, these two yield drinks with completely different flavors. Popular favorites like lattes and cappuccinos are built exactly this way — the difference being that a latte carries less foam on top.

The Importance of Milk in Coffee

Milk plays a decisive role in the cup. Good milk texture amplifies the coffee's flavor characteristics, and when steamed properly it turns silky and sweet. FrontStreet Coffee typically chooses whole milk: its fat and protein content not only boosts flavor but also stabilizes the foam.

Freshness matters just as much. Once milk has sat for several days, its proteins begin breaking down into amino acids. Refrigeration slows this process, but if milk is left out and not returned to the fridge promptly, deterioration accelerates — even if it still tastes and smells fine. So FrontStreet Coffee recommends always returning milk to the refrigerator right after use.

The Milk Frothing Process

With the milk selected, the next step is frothing. Frothing involves two stages: aerating and texturing. Here is how FrontStreet Coffee does it.

1. Pour milk into the pitcher, filling it so the liquid sits between 1/3 and 2/3 below the spout.

2. Clean the steam wand to remove any residue.

3. Bring the pitcher up so the steam tip just breaks the milk's surface, positioned slightly off-center. Open the steam valve and listen for the hiss of the steam working.

4. Once enough fine foam has formed, slowly lower the pitcher. This is the aerating stage, and the milk temperature should not exceed body temperature at this point! Heat the milk to about 60 degrees but never past 70 degrees, or the protein structure will be damaged.

5. Move on to texturing. Using the pitcher spout as a pivot, lift the pitcher so the wand sits deeper in the milk. The milk should spin into a vortex under the steam.

6. When the pitcher feels hot to the touch — 60-65°C; touch the base and you should not be able to hold it for more than 3 seconds — the texturing is complete.

7. Do not close the steam valve yet; use a burst of steam to clean the wand.

8. Tap the side of the pitcher to pop any large surface bubbles, then swirl to blend the milk and foam. A perfect microfoam, ready to pour!

Choosing the Espresso

With milk covered, let's talk espresso. Bean selection comes first — choosing beans that match your flavor preference is essential. FrontStreet Coffee currently pours the Sunflower Warm Sun blend as its house espresso. It combines Honduras Sherry with Ethiopia Yirgacheffe Red Cherry, and after relentless experimentation by our baristas we landed on a perfect 6:4 ratio. The resulting shot shows distinct fruit acidity, berry flavor and aroma, winey notes, and a comfortable aftertaste.

This blend is roasted in-house by FrontStreet Coffee, and it is not our only one — we keep three more espresso blends with different profiles. The FrontStreet Basic Blend pairs Yunnan beans with Brazilian beans at a 3:7 ratio, producing a shot with mild fruit acidity, caramel sweetness, nutty and dark chocolate flavors, and a smooth, thick texture, though the overall flavor is relatively light.

The FrontStreet Specialty Blend combines Colombia and Brazil beans at a 3:7 ratio set by our baristas. The shot is gently acidic and sweet with a nutty aftertaste — balanced and unaggressive, with medium crema.

Espresso Extraction Parameters

With beans selected, extraction begins. Here are FrontStreet Coffee's parameters for the Sunflower Warm Sun beans:

Grinder: Mahlkönig Guilio Q18

Grind size: 1.6

Pressure: 9 bar

Temperature: 90.5-96°C

Time: 20-30 seconds

Dose: 20g (double shot)

Yield: 40ml

In ideal conditions, the espresso leaving the portafilter should flow with uniform color and consistency. If the flow wavers, the grounds are either too fine or the tamp too firm — both extend extraction time and push the shot into over-extraction (harsh bitterness). Grounds too coarse or a tamp too light shorten the extraction and produce under-extraction (a watery taste, thin texture).

When the extraction succeeds, FrontStreet Coffee's espresso shows a smooth texture, medium body, distinct fruit acidity with subtle berry aroma, whiskey notes, rich chocolate flavor, and a noticeable aftertaste.

FrontStreet Coffee Recommendation

For readers learning to pour latte art at home, FrontStreet Coffee's Classic Blend is the essential starter bean. A medium-dark espresso recipe built from beans of three origins, it takes its inspiration from the old-school "Mamba" pairing of Mandheling and Brazil, with a small amount of robusta added for aroma and crema. The shot pours with pronounced notes of butter, toasted bread, and caramel biscuit — bold flavor, a solid body, fine crema, and remarkably stable extraction.

If you lean toward rich, nutty flavors, the FrontStreet Specialty Blend — Colombia washed beans matched with Brazil pulped-natural beans — delivers nuts, dark chocolate, and caramel in espresso, and in milk drinks like lattes and flat whites it blooms into soft aromas of cream, almond, and cocoa, with crema that loses nothing to café quality. And for anyone preparing to open a shop of their own, the FrontStreet Commercial Blend adds a touch of robusta to the Specialty Blend recipe, deepening the dark-brown crema and the body, so every Americano, latte, or mocha carries nuts, cocoa, and caramel — and makes latte art practice feel effortless.