My Cafelat Robot Recipe
References for pre-infusion time, extraction ratio, grind size and more to get a sweet espresso cup with a Cafelat Robot
In my tips to get started with your new Cafelat Robot I mentioned a few times my own recipes and the need to experiment with your Robot.
I'd like to share the recipe I use to start tuning my variables when brewing medium roasted beans such as espresso blends.
Remember this recipe is what works for me! I tend to favour brews with a slightly sweeter and fruity taste.
Recipe
Weight and Ratio: 16g for 36g. A 1:2.25 ratio.
Grind Size: I use slightly finer ground coffee than I would for a traditional espresso machine. This works better with the long pre-infusions.
For additional reference, I use a Niche Zero as my grinder and the settings on mine work out as:
- 4 for Cafelat Robot
- 6-8 for traditional espresso machines
- 34 for v60
Steps:
| Time | Weight | Pressure (Gauge) | Pressure (Feeling) |
|---|---|---|---|
| 25s pre-infusion | 1 - 1.5g | ~2 bar | Minor resistance against the water in the chamber |
| 30s extraction | 34.5g | ~8bar | Full resistance without going overboard. If you need to exert too much effort to get an even extraction then your grounds are too fine. |
Additional Notes:
- I pre-heat the portafilter/chamber using the steam coming out of the kettle while water boils. I don't bother preheating the Robot's piston.
- I don't lower the pressure during the final seconds of extraction unless it's a very light roast.
- I use boiling water for the recipe above.