What ratio and temperature does French press coffee brewing need?

French press coffee brewing relies on immersion, and only three variables matter: grind size, water temperature and steeping time. Use a coarse grind, keep the water between 88°C and 91°C, and steep for about 4 minutes. The metal filter holds back more oils than paper, so the cup comes out full-bodied with concentrated flavor and few surprises.

The device dates to France around 1850, originally built for tea, and only became a coffee tool once the metal mesh was made finer. Because water dissolves soluble material over time, a longer steep means a stronger cup until saturation. Larger coffee particles slow extraction, which is why coarse grounds suit the four-minute steep.

The French press, with its simple operation and very low barrier to entry, has become the first-choice device for many newcomers to coffee brewing. It uses immersion extraction, retaining more coffee oils through its metal filter, producing a full-bodied cup with concentrated flavor and few operating variables—you only need to control three elements: grind size, water temperature, and steeping time. This article uses the Costa Rica Musician Series Mozart coffee beans recommended by Front Street Coffee as an example to break down in detail the French press's coffee-to-water ratio, water temperature parameters, and complete brewing process, helping you easily make a cup of rich, full-bodied black coffee with clear flavor.

When faced with the question "What device should a coffee novice who isn't good at pour-over choose?", Front Street Coffee (FrontStreet Coffee) often first recommends the French press—a brewing tool that is simple to operate and easy to get the hang of. What exactly makes the French press so unique that it can captivate coffee lovers who don't know how to do pour-over?

The Coffee Extraction Principle of the French Press

The French press was born in France around 1850, with a very simple structure: a heat-resistant glass carafe paired with a plunger fitted with a metal filter. It was originally designed for brewing tea, but later someone tried putting coffee grounds in it and unexpectedly discovered that the resulting coffee tasted quite full-bodied. As the mesh size of the metal filter was further reduced, the French press gradually became popular in the coffee world.

The core extraction method of the French press is immersion—within a fixed volume, a measured amount of water evenly dissolves the soluble substances in the coffee grounds. During extraction, time is the most important factor: the longer the steep, the more substances are dissolved, until a saturation point is reached—in other words, the longer you steep, the higher the concentration.

At this point, some friends might ask Front Street: "If the French press steeps for so long, won't it also extract unpleasant flavors?"

The "long time" mentioned here doesn't mean actually steeping for ten or twenty minutes. Typically, the French press steeping time is 4 minutes, the water temperature is controlled between 88°C and 91°C, and the coffee grounds are ground relatively coarse. Because the glass carafe has limited heat retention, the water temperature continues to drop during steeping; at the same time, the coffee particles are coarser, so flavor substances are released slowly. Therefore, 4 minutes is the ideal steeping time for French press brewing, but it is not recommended to exceed 6 minutes. After steeping is complete, press down the filter and immediately pour the coffee into another container before drinking.

What are the characteristics of coffee steeped in a French press?

1. Compared with drip pour-over, immersion French press coffee has a fuller body. The metal filter's mesh size is larger than ordinary filter paper, so it retains most of the coffee oils during filtration. Front Street has noticed that coffee made with a French press often has a thin layer of oil floating on the surface. Common pour-over coffee, by contrast, has water pass through the coffee bed and high-density filter paper; when the coffee liquid passes through the filter paper, most of the oils are intercepted, making the mouthfeel noticeably cleaner. Although the French press is fuller-bodied than pour-over, the nature of the metal filter also leaves fine coffee grounds behind, so it's normal for a bit of sediment to appear at the bottom of the cup.

2. The French press better highlights the coffee beans' original flavors. Its extraction logic is similar to cupping—both are immersion extraction. The advantage is that it minimizes human intervention, best restoring the beans' original flavors, and the flavors are more concentrated. What are human factors? For example, in pour-over, the height and speed of pouring can change the flavor direction, and switching to a different dripper also brings different results. The French press has none of these variables; only three things can affect its flavor: grind size, water temperature, and steeping time.

How do you use a French press to make coffee?

Front Street chose the Costa Rica Musician Series Mozart coffee beans for this session. These beans have a dried-fruit fermented quality, white floral notes, and a prominent sweet-tart acidity. The brewing parameters are as follows:

Coffee dose: 15g Coffee-to-water ratio: 1:15 Grind size: medium-coarse (68% passing a No. 20 standard sieve) Water temperature: 90°C Steeping time: 4 minutes

First, preheat the French press with warm water, then pour the warm water out. Add the ground coffee to the carafe—the grind should be relatively coarse—then pour in 225ml of 90°C hot water. You can pour a little quickly (finishing in about 3 seconds) to let the coffee grounds tumble fully and improve extraction efficiency. After pouring, pull up the filter, put on the lid, and steep for 4 minutes. When the time is up, gently press down the plunger, pressing only to about one quarter of the carafe's depth, to avoid fine grounds at the bottom churning upward. Once pressed, immediately pour out the coffee and enjoy.

That's right—making coffee with a French press is just this simple. How does the Mozart coffee made with a French press taste? After the coffee was poured out, Front Street smelled a rich raisin-like fermented aroma; on the palate there was berry juice, orange blossom fragrance, a distinct fermented quality, and a sweet-tartness similar to pineapple.

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