Inside the Matcha Tea Process | From Harvest to Powder
Have you ever wondered about the fascinating journey of matcha tea from lush green fields to your cup? The matcha tea process is an intricate dance of tradition and precision, transforming shade-grown leaves into a vibrant powder packed with health benefits. As you delve into this world, you’ll discover how each step, from harvesting to stone-grinding, plays a crucial role in creating the unique flavour and nutritional profile that matcha enthusiasts adore.
You’re about to embark on an exploration of the meticulous matcha-making journey. We’ll guide you through the art of cultivating these special tea plants, the careful harvesting of precious green leaves, and the transformation of fresh leaves into tencha. You’ll also learn about the final stage where tencha is ground into fine matcha powder. Along the way, you’ll gain insights into the factors that contribute to matcha’s rich chlorophyll content, L-theanine levels, and its numerous proven health benefits.
Table of Contents
The Art of Cultivating Matcha Tea Plants – The Matcha Tea Process
You might be surprised to learn that cultivating matcha tea plants is a meticulous process that has been refined over centuries. The journey begins with selecting the right tea cultivar and employs unique shading techniques to enhance the flavour. Let’s explore the fascinating world of matcha cultivation.
Selecting the Right Tea Cultivar
In Japan, there are over 200 cultivars of matcha, but the Yabukita cultivar reigns supreme, accounting for nearly 75% of all matcha production. This cultivar, officially registered in 1954, has become the backbone of Japanese matcha. However, other notable cultivars like Okumidori, Samidori, Gokou, Hikari, and Asahi also play significant roles in shaping the diverse flavour profiles of matcha.
Each cultivar brings its unique characteristics to the table:
- Yabukita and Gokou: Known for their stronger flavours
- Okumidori: Offers a more mellow taste
- Hikari: Presents a slight bitterness
- Asahi and Okumidori: Lean towards the sweeter side
Shading Techniques for Enhanced Flavour
One of the most crucial steps in matcha cultivation is the shading process. About six weeks before harvest, typically in late March or early April, tea fields are covered to gradually decrease sunlight exposure. This technique, known as ‘hifuku saibai’ in Japanese, is what sets matcha apart from other green teas.
The shading process:
- Reduces photosynthesis
- Increases chlorophyll production
- Boosts amino acid content, particularly L-theanine
This results in leaves with an intense umami flavour profile and a vibrant green colour. The highest grade matcha is grown in near-darkness by harvest time, producing extremely delicate and thin buds.
Optimal Growing Conditions
To cultivate the finest matcha, you need to replicate specific conditions:
- Climate: A subtropical climate with average temperatures between 57 and 60 degrees Fahrenheit
- Rainfall: Stable rainfall with a yearly average of 1,300mm or more
- Soil: Well-draining soil with good ventilation and water retention, pH 4-5
- Location: Shaded area, at least 12 feet away from other plants
The main matcha-producing prefectures in Japan are Kyoto (Uji city), Aichi (Nishio city), Kagoshima, and Shizuoka. Each region’s unique climate contributes to subtle variations in taste, colour, and flavour, even within the same cultivar.
Harvesting the Precious Green Leaves
As you delve into the world of matcha tea, you’ll discover that harvesting the precious green leaves is a crucial step in the process. The timing and method of harvest have a significant impact on the quality and flavour of the final product.
Timing the First Flush
The first week of May brings a palpable energy to Japan’s tea-growing regions. This marks the beginning of the annual first tea harvest, also known as the first flush. It’s a bustling time for the entire tea industry, with farmers rushing to harvest the tea within a short two-week window.
The first flush tea leaves are considered the highest quality and most precious. Why? During winter, the tea plants store vital compounds. When new buds sprout in spring, these nutrients concentrate in each new leaf bud. This results in a complex flavour profile that’s sweeter and less astringent than leaves from later harvests.
Interestingly, the Japanese have a traditional way of determining the start of the harvest season. It typically begins on ‘hachiju-hachiya’, or the 88th night of Spring. As soon as the sprouts mature enough, they must be picked right away. If the leaves continue growing, they become Sencha instead of the prized Shincha (new tea).
Hand-Picking vs. Machine Harvesting
The method of harvesting also plays a crucial role in determining the quality of matcha tea. Let’s compare the two main approaches:
- Hand-Picking:
- Considered the traditional method
- Time-consuming and labour-intensive
- Allows for selective picking of only the youngest and most tender leaves
- Ideal for top-quality and specialty teas like ceremonial matcha
- Machine Harvesting:
- More time-efficient and cost-effective
- Allows for better control over harvest timing
- May compromise leaf integrity to some extent
- Suitable for lower elevation farms with flatter terrain
While machine harvesting has become more prevalent in modern Japan due to labour shortages and rising costs, hand-picking remains the preferred method for producing the highest quality matcha. Hand-picked harvests put less stress on the tea plants, allowing them to reach their full flavour potential.
From Fresh Leaves to Tencha
Once the precious green leaves are harvested, they embark on a journey to become tencha, the precursor to matcha powder. This process is crucial to preserve the unique qualities of the tea leaves and prepare them for the final grinding stage.
Steam Processing to Preserve Nutrients
Within 24 hours of harvesting, the tea leaves undergo a swift steaming process. This brief yet vital step, lasting about 20 seconds, serves multiple purposes:
- It halts oxidation, preserving the leaves’ vibrant green colour.
- It locks in the amino acids and other nutritional components.
- It helps maintain the elevated levels of chlorophyll and L-theanine developed during shading.
After steaming, the leaves pass through a blower to eliminate moisture condensation. This step ensures the leaves are ready for the next phase of processing.
Drying and De-stemming Techniques
Following the steaming process, the leaves undergo several crucial steps:
- Air-drying: This removes excess moisture from the leaves.
- Crushing: The dried leaves are gently crushed to facilitate sorting and de-stemming.
- De-stemming and de-veining: This crucial step ensures only the finest leaf material is used for matcha production.
These processes result in tencha – flat, de-stemmed, and de-veined leaves. Unlike other green teas, tencha doesn’t go through a rolling process, making stem removal easier and producing flat leaves ideal for matcha production.
The resulting tencha has a pale liquor with a deep, mellow flavour. While it bears little resemblance to the full-bodied matcha it will become, it’s an echo of the final product’s taste. This tencha, the ‘finished-unfinished’ product, is now ready for the final transformation into the rich green matcha powder you know and love.
Grinding Tencha into Fine Matcha Powder
The transformation of tencha into the vibrant green matcha powder you know and love is a process steeped in tradition and precision. As you delve into this final stage of the matcha tea process, you’ll discover the meticulous techniques that have been refined over centuries to create this unique tea.
Traditional Stone Milling Process
The art of stone-grinding tencha leaves has its roots in 12th century Japan, introduced by a Zen Buddhist monk named Esai. This time-honoured method uses an ishi-usu, a traditional granite stone mill, to grind the tencha leaves into a fine powder.
You might be surprised to learn that granite is chosen for its ‘soft’ quality, which helps to avoid excessive friction and heat that could burn or oxidise the leaves. The process is remarkably slow and deliberate:
- The mill rotates counterclockwise at a careful pace.
- Each revolution takes about three seconds.
- The mill completes roughly thirty revolutions per minute.
This painstaking process ensures that the leaves aren’t burnt by excessive speed, nor left with an uneven texture due to slow grinding. The result? A powder of unparalleled fineness and quality.
Modern Grinding Methods
While traditional methods are still revered, modern techniques have emerged to meet the growing demand for matcha. These include:
- Ceramic Ball Mills: Used primarily for culinary-grade matcha, these mills operate continuously overnight. While efficient, the heat generated can result in a paler colour compared to traditional methods.
- Bead Mill Method: This technique uses small balls or beads to crush the leaves, producing a fine, less clumpy powder. It’s faster and more cost-effective, capable of producing up to 20 kg per hour.
Despite these advancements, many producers still prefer the traditional granite stone mills for premium matcha. The slow grinding speed – taking a full hour to produce just 30g of powder – helps preserve the tea’s delicate nutrients and antioxidants. This method ensures a smooth texture and rich, full flavour that epitomises high-quality matcha.
Conclusion
The journey and the matcha tea process, from tea leaf to matcha powder is a testament to the dedication and expertise of tea cultivators and producers. From selecting the right cultivar to the meticulous shading and harvesting processes, every step has an impact on the final product’s quality and flavour. The transformation of fresh leaves into tencha, and ultimately into fine matcha powder, showcases the blend of tradition and innovation in the tea industry.
Matcha’s unique production process not only results in a delightful beverage but also enhances its nutritional profile. The careful cultivation and processing techniques help to preserve the tea’s natural compounds, resulting in a drink that’s not just tasty, but also packed with health benefits. As matcha continues to grow in popularity worldwide, understanding its journey from field to cup allows us to appreciate the craftsmanship behind every sip of this vibrant green tea.
FAQs
What does the matcha powder production process entail?
The creation of matcha powder involves several detailed steps. Initially, the tea leaves, known as tencha, are cultivated under shade to enhance their flavour and nutritional content. After harvesting, these leaves are steamed to halt oxidation, thereby preserving their vibrant green colour and nutrients. Following this, the leaves are dried, and the stems and veins are removed. The final step is grinding the leaves into a fine powder using a millstone.
How are matcha tea leaves harvested?
Matcha tea leaves are harvested by hand, specifically selecting leaves from the top third of the plant, which are known to have the highest nutrient concentration. Post-harvest, the leaves undergo steaming to stop oxidation, followed by drying. Subsequently, the leaves are destemmed and deveined to prepare them for further processing.
How are matcha leaves processed into powder?
To transform matcha leaves into powder, the process begins with selecting and hand-picking the desired leaves. These leaves are then steamed for about 1-2 minutes, cooled, and thoroughly dried. Afterward, the veins are removed, the leaves are sorted, and finally, they are crushed. The last step involves grinding the crushed leaves into a fine powder.