To brew espresso effectively, purchasing a coffee grinder is essential. Grinding beans fresh allows more control over grind size, improving the final product. A manual grinder requires knowing how to zero the burrs to get precise grind sizes. Zeroing refers to adjusting burrs close to each other without them touching. Once zero is found, adjust coarseness by ten clicks and taste the shot. Continual recalibration is necessary due to burr wear which affects grind quality over time.
Grinding your own beans gives you far more control over the grain size and, by extension, the quality of your final brew.
Zeroing a grinder involves finding the point where the burrs nearly touch, allowing for finer possible ground coffee when adjusted.
After establishing a zero point, adjust the grinder coarser by about ten clicks and fine-tune until you achieve your desired taste.
Recalibrating your coffee grinder is necessary because the burrs will eventually wear down, affecting the quality of the grind.
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