Quick Answer

To brew Chemex coffee for a group, use the Eight Cup Chemex with a 1:15 coffee-to-water ratio, medium-coarse grind, and water at 200°F. This yields about 40 ounces of coffee, perfect for 5-6 cups. Follow the step-by-step guide below for a clean, balanced brew that satisfies a crowd.

Hosting a brunch, a meeting, or a family gathering? Brewing coffee for a group can be a challenge, but the Chemex Eight Cup makes it easy to serve several people with a single, elegant pour-over. Its large capacity and iconic design ensure your coffee is both a conversation starter and a crowd-pleaser.

In this guide, we'll walk you through the exact steps to brew a large batch of Chemex coffee using the Eight Cup model. You'll learn the right coffee-to-water ratio, grind size, pouring technique, and common pitfalls to avoid—so you can serve a delicious, consistent cup to everyone.

Why Choose the Eight Cup Chemex for Group Brewing?

The Eight Cup Chemex is designed for larger batches, making it the ideal choice when you need to brew for a group. With a capacity of 40 ounces, it can fill about five to six standard mugs, which is perfect for small gatherings or office settings. Unlike smaller models, you won't need to brew multiple batches, saving time and ensuring everyone gets their coffee at the same temperature.

The Eight Cup is available in two versions: the Eight Cup Glass Handle CHEMEX® and the Eight Cup Handblown CHEMEX®. Both offer the same brewing capacity, but the handblown version is slightly lighter and has a more delicate, artisanal feel. Whichever you choose, you'll benefit from the Chemex's thick bonded filters that remove bitterness and sediment, resulting in a clean, flavorful cup.

Eight Cup Handblown CHEMEX®

Eight Cup Handblown CHEMEX®

  • 40-ounce capacity: serves 5-6 cups
  • Two versions: Glass Handle and Handblown
  • Thick bonded filters for clean taste

What You'll Need

Before you start, gather your equipment and ingredients. You'll need your Eight Cup Chemex, Chemex bonded filters (the square ones that fold into a cone), a gooseneck kettle (for precise pouring), a scale, a burr grinder, and freshly roasted coffee beans. Water quality matters too—use filtered water for the best taste.

For the coffee, a medium-coarse grind is ideal, similar to sea salt. This allows for a proper extraction without over-extracting, which can cause bitterness. If you're unsure about your grind, err on the coarser side—it's easier to adjust than a too-fine grind that clogs the filter.

  • Chemex Eight Cup coffeemaker
  • Chemex bonded filters (square, fold into cone)
  • Gooseneck kettle and scale
  • Burr grinder and medium-coarse coffee

The Perfect Ratio and Grind

For a large batch, the golden ratio is 1:15 (coffee to water). For the Eight Cup, that means using about 80 grams of coffee and 1200 grams (or milliliters) of water. This produces a balanced, flavorful brew that's not too strong or too weak. If you prefer a bolder cup, you can increase the ratio to 1:14, but be careful not to go too strong, as it can become bitter.

Grind size is crucial. A medium-coarse grind (like coarse sand) works best. If your grind is too fine, the water will take too long to pass through, leading to over-extraction and a bitter taste. If it's too coarse, the water will flow too quickly, resulting in a weak, under-extracted cup. Use a burr grinder for consistency.

  • Use 80g coffee to 1200ml water for a 1:15 ratio
  • Adjust ratio to 1:14 for a stronger brew
  • Grind to medium-coarse, like sea salt

Step-by-Step Brewing Process

Now, let's get brewing. Follow these steps carefully to achieve the best results. Remember, patience is key—rushing the pour will affect the flavor.

Start by placing the filter in the Chemex, with the triple-fold side against the spout. Rinse the filter with hot water to remove any paper taste and preheat the vessel. Discard the rinse water. Then, add your ground coffee and gently shake to level the bed.

  • Rinse filter thoroughly to avoid paper flavor
  • Ensure coffee bed is level for even extraction

Mastering the Pour

The pouring technique is what separates a good Chemex brew from a great one. Begin by blooming the coffee: pour just enough water (about twice the weight of the coffee) to saturate the grounds, then wait 30-45 seconds. This allows CO2 to escape and ensures even extraction.

After the bloom, continue pouring in slow, circular motions, starting from the center and moving outward. Keep the water level consistent, and avoid pouring directly onto the filter edges. The entire pour should take about 3-4 minutes. If it's too fast, your grind is too coarse; if too slow, it's too fine.

  • Bloom with 160g water for 30-45 seconds
  • Pour in circles, keeping water level steady
  • Total brew time: 3-4 minutes

Serving and Keeping Warm

Once the brew is done, remove the filter and give the coffee a gentle stir to ensure consistency. Serve immediately in pre-warmed mugs to keep the coffee hot longer. If you need to keep it warm for a while, consider using a Glass Coffeemaker Cover to reduce evaporation and retain heat.

For a party, you might want to transfer the coffee to a thermal carafe. However, avoid leaving it on a heat source, as this can scorch the coffee. The Chemex is best enjoyed fresh, so brew as close to serving time as possible.

  • Pre-warm mugs to maintain temperature
  • Use a glass cover to keep coffee warm
  • Brew close to serving time for best flavor

Step-by-Step Brewing Steps

  1. Step 1: Prepare the filter and Chemex: Fold the Chemex bonded filter into a cone and place it in the top of the Eight Cup Chemex, with the triple-fold side against the spout. Rinse the filter with hot water to remove paper taste and preheat the glass. Discard the rinse water. Checkpoint: The filter should sit snugly, and the glass should be warm to the touch.
  2. Step 2: Add coffee and bloom: Weigh 80 grams of medium-coarse ground coffee and add it to the filter. Gently shake to level. Pour 160 grams of hot water (around 200°F) over the grounds, ensuring all are saturated. Wait 30-45 seconds for the bloom. Checkpoint: The coffee should bubble and expand; if it doesn't, your beans may be stale.
  3. Step 3: Pour the remaining water: Slowly pour the remaining water (about 1040 grams) in a steady, circular motion, starting from the center and moving outward. Keep the water level just below the top of the filter. Aim to finish the pour in 3-4 minutes. Checkpoint: The total brew time should be around 4-5 minutes. If it's too fast, grind coarser; if too slow, grind finer.
  4. Step 4: Serve and enjoy: Once the water has drained, remove the filter and discard the grounds. Give the coffee a gentle stir to mix any remaining oils. Serve immediately in pre-warmed mugs. Checkpoint: The coffee should be clear and aromatic, with no bitterness.

Product Facts

  • Eight Cup Glass Handle CHEMEX®: Each coffeemaker is inspected and polished by one of our team before being boxed up for shipping. Used with Chemex Bonded filters, it removes fats, bitterness, acidity, and sediments. This ensures a consistent, clean brew every time, making it reliable for group servings.
  • Eight Cup Handblown CHEMEX®: Each coffeemaker is inspected, polished, and hand tied by one of our team. The handblown glass offers a unique, artisanal look. If you value craftsmanship and a lighter feel, this version adds aesthetic appeal to your brewing ritual.

Brewing Chemex coffee for a group doesn't have to be complicated. With the Eight Cup model and this step-by-step guide, you can serve a delicious, crowd-pleasing batch that highlights the clean, balanced flavors Chemex is known for. Whether you choose the Eight Cup Glass Handle CHEMEX® or the Eight Cup Handblown CHEMEX®, you'll be equipped to impress your guests. So next time you're hosting, skip the drip machine and brew a Chemex that everyone will remember.