You’ve got your professional espresso machine warmed up, your barista tools at the ready, and a fresh bag of Hot Numbers Coffee beans waiting to be brewed. But translating those beautiful beans into the perfect cup requires a bit of calibration.

Dialing in your espresso is both an art and a science. Whether you are running a busy café service or chasing café-quality shots at home, these essential tips will help you get the absolute best out of your Hot Numbers coffee.

1. Patience is Key: Let Your Beans Rest

It’s tempting to tear into a bag of coffee the second it arrives from the roastery, but patience pays off. Always try to leave your coffee to rest for 2 to 3 weeks after the roast date before using it for espresso. This resting period allows excess carbon dioxide to degas. If you brew too fresh, that trapped gas will cause erratic, bubbly extractions that are incredibly difficult to dial in.

2. Start Clean and Dry

Before pulling a shot, always make sure your portafilter is completely clean and dry before adding any coffee. Leftover moisture will cause the dry coffee to clump and stick to the basket, leading to channeling. Old coffee oils or grounds will taint the flavor of your fresh shot.

3. Weigh Everything

Consistency is the secret to great espresso. Always make sure to weigh your dry coffee before pulling shots. Guessing your dose based on the "look" of the basket will lead to wildly fluctuating extraction times and flavors. Invest in a good set of barista scales and use them for every shot.

4. Aim for the Golden 1:2 Ratio

If you aren't sure where to start your recipe, the specialty coffee standard is your best friend. Typically, you want to run a 1:2 ratio for your coffee. This means if you have 18g of dry ground coffee going into the portafilter, you want exactly 36g of liquid espresso coming out into your cup.

5. Target a 28-Second Baseline

With your 1:2 ratio set, start by aiming for a 28-second extraction time. This hits the sweet spot for most of our Hot Numbers roasts, giving you a fantastic baseline. From here, you can taste the shot and understand exactly how you need to tweak your grind size going forward.

6. Adjusting Grind Size? Keep the Motor Running

This is a vital step for the health of your equipment: when making changes to grind size, if you are going finer, make sure your grinder is turned ON. Adjusting the burrs closer together while the motor is off can cause whole beans stuck in the burrs to jam the motor, potentially damaging your grinder.

7. Always Purge After Adjusting

There is always a small amount of ground coffee retained in your grinder's chute. When changing your grind size, make sure you waste (purge) 2 or 3 shots before testing the new setting. If you test the very next shot, you are mostly brewing the old grind size, which will give you false feedback.

8. Respect the Weather

Coffee beans are highly porous and react to their environment. Whenever large temperature or humidity changes happen throughout the year, your grinder will require larger grind changes. On a rainy, humid morning, your coffee will absorb moisture and swell, often requiring you to adjust your grind slightly coarser to maintain that 28-second extraction.

Troubleshooting Your Shots

Even with the perfect setup, you will occasionally pull a shot that falls outside of your target parameters. Here is how to diagnose what went wrong in the cup:

  • The Fast Shot (Under 20 Seconds): An espresso extracting under 20 seconds is running too fast (under-extracted). This will typically give you a sharp, acidic espresso shot with very little body.

    • The Fix: Make your grind size finer to slow the water down.

  • The Slow Shot (Over 35 Seconds): An espresso extracting over 35 seconds is running too slow (over-extracted). This will typically produce a bitter, roasty shot with a heavy, lingering body.

    • The Fix: Make your grind size coarser to let the water flow more freely.

With these tips in your arsenal, you are well on your way to pulling consistently sweet, balanced, and complex shots. Happy brewing!