How to Make Butter Stretched Coffee? Learn to Recreate the Viral Butter Latte at Home

Recently, adding butter to coffee has set off yet another trend! Butter — also known as butter oil or milk fat — is the product obtained by separating light cream and skim milk from whole milk, then maturing, churning, and otherwise working the cream.

The Evolution of Butter in Coffee

Originally, butter's main job was seasoning food during cooking. As production techniques improved and cold-chain transport arrived, butter spread across the world! And once popularized, it stopped being food-only. Different regions long ago began adding butter to all sorts of beverages — coffee included. In Singapore, for example, drinking coffee with butter has been a daily routine for locals for generations; such a cup is known locally as "Kopitiam."

There, beans are ground to powder and brewed in a cloth bag called a "sock," and butter goes in after brewing! Because the beans used are Robusta, with a strong bitter bite, condensed milk is also added at the bottom of the cup to soften it. Then there's bulletproof coffee, which FrontStreet Coffee covered a while back — a drink that caught on among Western fitness enthusiasts for its claimed fat-burning effects. Its core ingredients are black coffee, butter, and MCT oil (medium-chain triglycerides).

Bulletproof coffee made this way creates a feeling of satiety that suppresses cravings for sugar and other carbohydrates. With the body unfed and in a state of continuous hunger, fat replaces food as fuel and is steadily burned — hence the claimed fat-reducing effect! Note, though, that the oil makes this coffee rough on sensitive stomachs, so bulletproof coffee should be approached with caution. But the butter coffee currently trending online isn't one of these traditional specialties at all — it didn't go viral for its taste or its effects. The real reason behind its popularity is genuinely surprising!

The "String-Pulling Butter Coffee" Phenomenon

"String-pulling butter coffee" began when a netizen, mid-experiment with butter coffee, had a sudden idea: drop the butter directly into the espresso extraction and pull a shot with a rich butter aroma. Unexpectedly! With a bottomless portafilter in place, the machine pressed the butter straight out in solid form!

The process is mesmerizing to watch — the butter extrudes slowly like noodles. This visually striking "butter coffee" went viral almost the moment the video was posted! And the method is exactly as simple as it sounds: lay the butter into the portafilter first, add the coffee grounds and tamp, then extract directly to get the "string-pulling" effect. Because the result looks so much like strands of thread noodles, netizens have also jokingly dubbed it "butter noodle coffee."

Why FrontStreet Coffee Doesn't Recommend This Trend

That said, FrontStreet Coffee strongly advises against trying it, for two reasons. First, the extraction will be badly uneven. We tamp coffee in a portafilter precisely to ensure the puck doesn't channel during extraction from an uneven particle distribution — which would wreck flavor uniformity. Adding a block of butter inevitably disrupts the layout of the grounds. Once the butter has been pressed out, the puck's structure changes and collapses, and the taste of the resulting coffee is entirely predictable (and because the butter takes up space, the grounds can't even reach the portafilter's standard capacity)! The second issue is that solid butter must be used. Sitting beneath the coffee puck, it dramatically raises the machine's initial extraction pressure. Commercial machines can bleed off that excess through their pressure-relief function — but what about home machines without one? This stunt can easily trigger a malfunction, send the machine back to the factory, and cost you real money!

The Cleaning Nightmare

On top of that, cleaning isn't just a matter of washing the portafilter! When the machine releases pressure, it sucks up every drop of liquid from inside the portafilter — meaning every pipe from the distribution screen to the pressure-relief valve gets coated in butter!!!! After FrontStreet Coffee made one string-pulling butter coffee, it took a full half hour of cleaning to purge the butter smell from the pipes, and the machine nearly had to be disassembled. So if you simply want a cup of rich butter coffee, FrontStreet Coffee suggests melting the butter and adding it separately. That way the coffee extracts properly, the butter blends smoothly, and the taste is far more pleasant~

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FrontStreet Coffee

No. 10, Bao'an Qianjie, Yandun Road, Dongshankou, Yuexiu District, Guangzhou, Guangdong Province

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The Right Beans for Milk Coffee

Most people who add milk to coffee want two things: the bitterness tamed and the mouthfeel made silkier. Since different beans react to milk in very different ways, it pays to choose beans that match your brewing method. For espresso machines and moka pots — both built to produce a concentrated base that becomes an Americano with water or a latte with milk — most espresso blends are roasted medium-dark, so the latte shows rich nut and chocolate notes with a pronounced coffee backbone.

FrontStreet's House Picks for Lattes

The Classic Blend is the first choice: designed specifically for espresso and moka pot brewing, its standout strength is superb crema — even a novice on a basic home machine can pull dense, silky foam, which is exactly what lattes, cappuccinos, and Dirts depend on. Its traditional Mandheling-Brazil recipe tastes mellow and warm, approachable for veterans and beginners alike. If buttery crema is your priority, the Classic Blend and FrontStreet Coffee's Commercial Blend both contain a touch of Robusta that pushes out more golden foam while maxing out body and caramel aroma; for balanced nuttiness at friendly prices, FrontStreet Coffee's Premium Blend and Black Cocoa Blend (100% Arabica) deliver almond, apricot-kernel, and walnut complexity with a silky entrance.

And for Fruit-Loving Milk Drinkers

Prefer your milk coffee with fruit character? The Strawberry Candy blend is a popular fruit-forward espresso blend that recreates a vivid strawberry-soft-candy sweetness by fusing the native flavors of Arabica beans from different origins — equally at home in daily family drinking or café service, and perfect for shops wanting a distinctive signature milk coffee.