Sketch from our Brew-it-Yourself series, courtesy of Artistic Type.
The grind affects the quality and flavour of your cup of coffee and in this case: size matters. It is important to match up your grind with your brewing method as grind size affects the water flow through the coffee.
Brewing methods which expose coffee grounds to heated water for longer, such as a V60, require a coarser grind. If beans are ground too fine for this method, too much surface area will be exposed to the heated water. If your grind is too fine, you will be able to tell as it can taste bitter (or over extracted). On the other hand, if you used a coarse grind when making espresso, you’ll produce weak or diluted coffee. Ground coffee begins to oxidise within minutes of grinding, which will affect the acidity and the body of the cup.
PART TIME ROCK-STAR & FULL TIME COFFEE NERD, MIKEY, GIVES YOU THE LOWDOWN THIS MONTH ON THE PERFECT V60 HOME BREW...
Mikey Climpson recommends a Ceramic Hand Grinder as the perfect addition to your home coffee shrine. Ceramic stays sharp, it is easy to clean and doesn’t rust. Hario and Porlex are the way to go!
"It is a morning ritual of mine to wake up, hand-grind some coffee beans, and gather my thoughts for the day ahead. I recommend a Ceramic Hand Grinder and 15g of coffee to 250ml water for a 1 Cup v60 or 30g coffee to 500ml water for a 2 Cup v60.
The grind size for a 2 cup v60 will be larger than the 1 cup. On my grinder at home as a basic rule for a single cup I will tighten the ceramic burrs all the way then back it off 5 clicks (2 cup, 7 clicks). We aim for a brew time of 2:15 to 2:30; this time is recommended to get the perfect extraction based on the above formula. If you find it is taking longer then simply make the grind coarser and try again."