How to Dial In a New Coffee Roast: A Step-by-Step Guide

Quick answer

To dial in a new coffee roast, start with a baseline recipe, then adjust one variable at a time—grind size first, then dose or ratio—based on taste. Keep a brewing log, use a scale, and be patient; small changes can make a big difference. For espresso, aim for a balanced shot in 25-30 seconds; for pour over, target a total brew time that suits your brewer and taste.

When you get a new roast from a coffee roaster, the first few brews are rarely perfect. That's normal. Dialing in is the process of adjusting your brewing variables to match the coffee’s unique characteristics. Whether you're pulling espresso or brewing pour over, a consistent approach saves time and beans.

This guide walks you through a practical, step-by-step method to dial in any roast. You'll learn what to adjust, when to adjust it, and how to avoid common pitfalls. By the end, you'll have a repeatable process that works for any coffee, not just the one in your grinder.

Start with a baseline recipe

Before changing anything, establish a starting point. For espresso, use a dose of 18 grams and aim for a 1:2 ratio (36 grams out) in 25–30 seconds. For pour over, use a 1:16 coffee-to-water ratio with a medium-fine grind and a total brew time around 3 minutes for a single cup.

These baselines are just starting points—they’re not rules. Different coffees, roasters, or brewers may need tweaks. But having a known reference lets you isolate variables. If the first brew tastes off, you know it’s because one of your variables isn't matching that particular coffee.

• Use a scale to measure coffee and water consistently.
• Keep a simple brewing log to track changes and results.

Adjust grind size first

Grind size is the most powerful lever for changing extraction. If your espresso runs too fast (under 25 seconds), grind finer. If it takes too long and tastes bitter, grind coarser. For pour over, a finer grind increases extraction and brew time; a coarser grind does the opposite.

Make small changes—one or two steps on most grinders—and brew again. Taste for balance: if the coffee is sour or acidic, it’s usually under-extracted, so grind finer. If it’s bitter or astringent, it’s over-extracted, so grind coarser. Give each change a fair chance before moving the next variable.

• Change only one variable at a time to know what caused the difference.
• If the coffee tastes sour, grind finer; if bitter, grind coarser.

Fine-tune dose and ratio

Once grind size is close, adjust the dose or ratio to fine-tune strength and flavor. For espresso, you might increase the dose to add body or reduce it for a lighter cup. For pour over, changing the ratio alters strength and extraction. A higher ratio (more water) extracts more, which can reduce perceived acidity.

Remember that dosage changes also affect brewing time. If you increase the dose, you may need to adjust the grind slightly to keep the same extraction time. Work in small increments—0.5 grams for espresso, or 5–10 grams of water for pour over—and taste each batch.

• Use a clear target ratio (e.g., 1:2 for espresso, 1:16 for pour over) to stay consistent.
• If the coffee is too strong, try a higher ratio instead of grinding coarser.

Control water temperature and time

Water temperature is often the forgotten variable. Most home brewers use water just off the boil, but darker roasts or more delicate coffees may benefit from slightly cooler water (around 195°F/90°C) to avoid bitter notes. For lighter roasts, hotter water can boost extraction and sweetness.

Brew time is a reflection of grind size, dose, and technique. If your pour over takes too long, you may be pouring too aggressively, or your grind may be too fine. For espresso, the time window is your main indicator—adjust grind and dose to hit the right range while keeping taste balanced.

• Use a thermometer or electric kettle with temperature control to keep water consistent.
• Pour over: if total time is under 2:30, grind finer; over 4:00, grind coarser.

Taste and iterate

Dialing in is an iterative process. Taste each brew, note the dominant flavors, and make one adjustment at a time. Keep your brewing log updated with the recipe, grind setting, and tasting notes. Over multiple sessions, you'll zero in on the sweet spot for that roast.

Don't be afraid to go back to a previous setting if the change didn't help. The goal is to find a pleasing balance, not to hit a perfect number. Remember that some coffees—like light roasts from high-altitude farms—may never be completely free of acidity; you're aiming for a pleasant cup.

• Use a flavor wheel to identify tastes (sour, bitter, sweet, etc.) and make targeted changes.
• If a coffee is still under-extracted, try increasing water temperature instead of going finer.

Step-by-step dialing-in process

1. Set your baseline recipe: Choose a starting dose, ratio, and brew time. For espresso, that's 18g in, 36g out, in 25-30 seconds. For pour over, use a 1:16 ratio and aim for 3 minutes total. Write it down. Checkpoint: Your coffee should be within a few seconds of the target time; if it's way off, don't taste yet—adjust grind next.
2. Adjust grind size based on taste: Brew your baseline. If the coffee is sour, grind finer. If bitter, grind coarser. Change only one step at a time, then brew again. Checkpoint: After each adjustment, taste again. Don't move on until you feel the coffee is almost balanced.
3. Tweak dose or ratio: Once grind is close, change the dose or ratio in small increments to fine-tune strength. For espresso, try 0.5g changes; for pour over, adjust water by 10-20g. Checkpoint: If the brew time shifts more than a few seconds, you may need to re-adjust the grind. Keep tasting and adjusting until it tastes great.
4. Consider water temperature: If the coffee is still under-extracted (sour) with a fine grind, try hotter water. If it's over-extracted (bitter), try cooler water. The sweet spot is usually between 195°F and 205°F. Checkpoint: Not all coffees respond well to water temperature changes—small adjustments (5°F) can make a noticeable difference.
5. Log and repeat: Write down the final recipe that tastes good. If you change anything later, you can always return to this baseline. After a few brews, you'll know the roast well. Checkpoint: The right recipe is the one that tastes good to you. Stick with it for that roast, and enjoy.

Products to support your dialing-in process

• Timemore Coffee Server 600ml: This Timemore Coffee Server holds 600ml and is designed for use in a cafe or warehouse setting. It is a reusable option for serving and pouring coffee. 600ml capacity for serving multiple cups. Reusable design for everyday use. Suitable for cafe and warehouse environments. From the Onyx Coffee Lab brand. When you're dialing in a new roast, you may brew several batches to compare. A 600ml server lets you serve multiple cups at once or hold a full pour over batch, making side-by-side tasting easier.
• Origami Cone Filter 2 Cup: The Origami Cone Filter 2 Cup is a practical brewing accessory designed for use with your Origami dripper. This pack of cone filters is intended for a two-cup brewing session, making it a convenient addition to your daily coffee routine. Compatible with Origami cone brewers for a 2-cup batch. Simple, functional design for consistent filter performance. Ideal for cafe use or home brewing setups. Consistent paper filters are essential when dialing in pour over—they help reduce variables. Having a compatible filter, like this Origami option, ensures your brew method stays consistent, so you can focus on adjusting grind and ratio rather than dealing with clogging or variance.

Dialing in a new coffee roast doesn't have to be intimidating. By following this step-by-step process, you'll learn how each brewing variable affects your cup, and you'll develop a repeatable method that works for any bean. Remember to change one thing at a time, keep notes, and trust your taste buds. Soon, you'll be pulling shots and pouring over cups that highlight the best of every roast.