A koicha is the stronger of the two preparation, and is by far my favorite. Before sitting down for meditation, I like to make a koicha. This is a matcha meditation experience of the highest caliber in my opinion. Here, more matcha and less water is used than in the preparation of usucha. The typical ratio is about 4 (or 5, if you dare) chashaku scoops (~4 grams or 1 1/2 - 2 tsp) to only 30 - 40 ml (1 - 1.5 oz) of water. You still use the chasen, but rather than whisking, you gently, attentively and mindfully knead or massage the matcha. This yields a concentrated elixir with no foam or bubbles, and with the consistency of warm honey or melted chocolate. Due to its concentrated nature, only the highest quality matcha should be used and the flavor should be full, vegetal, sweet and with minimal amounts of bitterness.
Let the entire process be a meditation for your senses. As you select your chawan, observe it fully. Hand made chawan are never completely smooth, even and symmetrical, so allow your eyes to drink in the contours and colors. Notice the lines. Run your fingers over the texture and feel its weight in your hands.
As you prepare the matcha, notice the intensity of the green. Does the color jump out at you? Is it bright, electric, and vibrant, or flat and dull? What aromas tickle your nose? Can you smell a hint of fresh cut grass or young vegetables, like baby asparagus?
Transferring the matcha into the sieve with the chashaku is an exercise in balance and patience itself. Why hold your breath and tighten your body? Breathe freely. Using gentle pressing motions, relaxing your shoulders and arms, take your time sifting the powder. You are not in a rush. Slowly pour the water into the chawan without disrupting the matcha and causing it to splash about. Whether making usucha or koicha, hold your chasen lightly in your fingers, never gripping it too tightly. Proceed to whisk or massage the matcha with love, care and intention. Rinse your chasen and return it to its stand, allowing it to rest until its next use.
Find a seat and prepare for the next stage of the experience. Bringing your chawan toward your face, observe once more with eyes and nose. Is the brew before you creamy and rich, fully of frothiness? Are the bubbles of the creama in your usucha small and tiny? Is the consistency of your koicha thick and viscous like melted chocolate? Is the smell even more pronounced now - very fresh and vegetal, not dull and dry?
And the taste... What are the first notes you detect as the matcha hits your tongue? Are you filled with a rush of sweetness (due to theanine content) or umami (due to theanine and glutamic acid)? Do you note any bitterness (due to caffeine and catechin) or astringency (due to catechin)? Excellent matcha should have a finishing or lasting note that remains on the tongue for 20 - 30 seconds, causing you to smile.
Now sit back and ride the waves of sensations that arises. Unlike the buzz from coffee or even green tea, matcha has less caffeine than those with high levels of theanine, said to increase alpha waves related to states of calm and relaxed focus and attention that can last up to six hours. However, the taste alone can increase your sense of delight.
Matcha can be made in many more ways than I describe here - from lattes to lemonade. But if you are interested in exploring the more classical style of matcha, try these methods I outline. Make both an usucha and a koicha and see what your prefer. Using the same matcha, notice if you can taste the differences between the two preparations - they should have distinct flavor variations.
What are your favorite ways of making matcha? I would love to hear about them!