Does brewing drip bag coffee with milk beat boiling coffee?

Drip bag coffee can be brewed with milk, but milk extracts far less than hot water, and heating it toward boiling changes proteins and lactose for the worse. Pre-infusing with hot water, then pouring 75°C milk in two stages, gave an acceptable cup, yet it took about 20 minutes and the filter bag clogged easily.

Easier routes exist: extract a concentrated black coffee and dilute it with milk in proportion, or drop the bag straight into milk and refrigerate overnight for an iced latte. Front Street Coffee also lists varieties suited to milk by roast level, for both the rich-flavor camp and those avoiding bitterness. Avoid boiling coffee with milk.

Can drip bag coffee be brewed directly with milk? This article conducts an experiment around this question. Front Street Coffee previously verified that milk's extraction capacity is far lower than hot water, and if heated to boiling, changes in proteins and lactose will affect the taste. To make up for this shortcoming, Front Street tried pre-infusing with hot water first, then pouring 75°C milk in two stages. The resulting flavor was acceptable, but it took as long as 20 minutes and the filter bag clogged easily. There are also more convenient alternatives: first extract a concentrated black coffee and dilute with milk in proportion, or put the drip bag directly into milk and refrigerate overnight to easily get an iced latte. The article also recommends Front Street Coffee varieties suitable for pairing with milk for different roast levels, for both the rich-flavor camp and the bitterness-averse camp.

A reader left a message saying that recently, taking advantage of a promotion, they stocked up on quite a few drip bag coffees and wanted to brew them in different ways. As a result, they found a rather unconventional method—using milk instead of water to brew drip bag coffee. Since they had never tried it and were afraid of wasting a good bag of beans for nothing, they came to ask Front Street whether this method is reliable. Front Street is always happy to accompany coffee lovers in trial and error. So without further ado, let's get hands-on and brew a cup to see.

Is it actually okay to brew drip bag coffee with milk?

Actually, milk taking the main stage in coffee extraction is not the first time in Front Street's experiment records. Last year we wrote an article "Is it feasible to brew pour-over coffee with milk?" The conclusion was: milk contains too many dissolved substances, and its extraction capacity simply cannot compare with ordinary hot water; moreover, once heated to scalding, a large amount of protein and lactose will change, and the taste actually becomes worse. So directly copying conventional pour-over parameters and techniques and using milk to brew drip bag coffee clearly won't work.

To make up for the shortcoming of milk's weak extraction power, Front Street's solution is: first use hot water for blooming, letting the coffee grounds absorb enough water to help better release flavor in the later stage; then heat the milk to 75°C and pour it in two stages.

To avoid brewing a milk coffee that is both sharply sour and weak, Front Street still recommends prioritizing medium or dark roast drip bags. For those who like a rich taste, you can choose Front Street Bird of Paradise, Front Street Queen's Manor, Front Street PWN Golden Mandheling, and Front Street Yirgacheffe—they have obvious caramelized aromas and pair more harmoniously with hot milk;

If you are more sensitive to bitterness, then fruity-acidic drip bags with a fermented feel are more recommended, such as Front Street Sidra, Front Street Big Belly, Front Street Strawberry Candy, and Front Street Mozart. They combine candied fruit, fruity aroma, fermented winey notes, and a certain caramelized flavor, making them very suitable to drink with milk.

Specific operation for brewing drip bag coffee with milk

First prepare a tall glass, then take a fresh bag of Front Street Strawberry Candy drip bag coffee, tear open the packaging and hang it on the rim of the cup (to give everyone a more intuitive reference, Front Street will time and weigh throughout this brewing).

For the first stage, pour 90–93°C hot water into the drip bag until the filter bag is half full (after boiling, turn off the heat, leave the lid open and let it sit at room temperature for 1 minute), about 25 grams of water. Try to keep a small stream; if using a gooseneck kettle, you can appropriately circle around.

After the coffee liquid finishes dripping, begin pouring the second stage: pour 75°C hot milk (hot enough that you cannot hold it with your hand) into the coffee bed until the filter bag is 9/10 full. When the coffee liquid is almost drained, continue pouring the next stage until 9/10 full. Control the total amount of water and milk at 150 grams.

Visually, the whole cup of coffee is a rather strong milk-tea color. As for the coffee's taste alone, Front Street thinks both the richness and aroma pass muster; drunk directly it has flavors of strawberry jam, raisins, and cream, and whether drunk directly or with ice, the taste is good.

However, after the coffee contacts the milk, the fine particles expand faster and clog the gaps in the filter bag, so the flow rate during the second extraction stage slows noticeably, and the total drip time reaches 11 minutes.

Add to that the time for preparing various ingredients, and this Front Street Big Belly drip bag took 20 minutes from start to finish just to barely make a milk coffee, and afterward you still have to clean the tools used to heat the milk, which clearly runs counter to the convenience that drip bags are known for. So if you want to quickly make a cup of milk coffee with a drip bag, Front Street does not particularly recommend this direct pouring method.

What other methods are there for drip bag coffee plus milk?

After so many years of development in China, everyone has also explored quite a few new ways to combine drip bag coffee with milk, and Front Street happens to have two here. One is to first use hot water to extract a rich black coffee, then add an appropriate amount of fresh milk in proportion. For the specific operation, you can refer to the article "How to make latte coffee with drip bags?" Front Street will not repeat it here.

The other is more suitable for people who prefer iced milk coffee, and the steps are also simple: just prepare drip bag coffee, a bottle of milk (fresh milk tastes better), and a refrigerator, and after a sleep you can easily achieve "latte" freedom.

The operation is very simple: after taking out the drip bag, there is no need to tear it open. Just peel off the outer paper shell, then drop it in bare into the milk, tighten the bottle cap and shake hard up and down, with the aim of letting the milk soak through the coffee grounds inside. Because it is low-temperature extraction, Front Street believes the ratio of coffee to milk does not need to be too strict; roughly between 1:12 and 1:15 is fine. For example, here Front Street uses one 10-gram drip bag coffee and adds 150 milliliters of fresh milk.

Next, put the milk with the drip bag soaking in it into the refrigerator overnight. The next morning (about 8–12 hours later), take it out and shake it hard a few more times, remove the drip bag, and the milk coffee is ready.

The above content is compiled by CoffeeHunters, a coffee news website.