To evaluate a matcha sample, test it blind against the matcha you pour now, in your own drinks, against pass marks you write down before you taste, then get the lot you tasted named in your quote. I send wholesale matcha samples to cafes and other businesses myself, so hold ours to every step here too.
Here I cover the cup: to vet the supplier's paperwork, see my supplier checklist, and for fixing a bitter or grassy cup you already pour, see my bar-side guide.
Key Takeaways
- A sample speaks for one lot, so the result only counts if your order ships from that lot.
- Test blind against your current matcha as the control, with pass marks written before anyone tastes.
- A 30 g bag covers six tasting rounds (22 g) at a 3 g shot, with 8 g kept sealed as a reference.
- Compare cost per drink, not price per kilo, and book the test inside the quote's validity window.
What is a matcha bench test?
A matcha bench test is a side-by-side tasting of a supplier's sample against the matcha you pour now, in your own recipes, before you buy a lot. Japan's plant variety register (Ministry of Agriculture, Forestry and Fisheries, in Japanese) has an entry for a tencha variety bred in Uji (tencha is the leaf matcha is ground from) that describes the finished product by its appearance (shape, color and luster) and inner quality (aroma and taste).
My bench test follows that order: look, smell, taste. Then it adds what a cafe needs and the register doesn't describe: the drink in your milk, over ice, and after it sits.
Your current matcha is the control, and the only fair yardstick, because "good" behind a bar means good in your cup.
How should you spend a 30 g sample?
Plan a 30 g sample before you open it: at a 3 g shot, six tasting rounds use 22 g and the last 8 g stays sealed as your reference for the first delivery. I work from our 3 g house matcha shot recipe, 3 g of matcha in 45 ml of water, a 1:15 ratio.
The sealed reference is the only physical record of the lot you agreed to buy. Keep it in its own bag with the air pressed out, sealed, cool and dark, and don't touch it until the first delivery arrives.
How do you set up a fair bench test?
Set up a fair bench test so the matcha is the only difference between the cups. Hold everything else still:
- Run sample and control on the same day, in the same hour.
- Weigh every dose on a scale, and sift both powders.
- Use the water, milk, cups and ice you serve with.
- Have someone else make and code the drinks: cups marked by letter, the key face down on a slip.
- Taste with two or three people, including whoever makes drinks on a busy shift.
- Write the pass marks on the score sheet before anyone tastes.
- Testing two or more samples? Put each one against the same control in the same session, so every sample faces the same yardstick.
Code the cups, because what tasters know about a cup changes how it tastes to them. In a 2008 study in PNAS, people tasted wines they believed were different and sold at different prices, and a higher price raised how pleasant they reported the flavor (Plassmann et al., 2008). Here the recipe stays fixed and only the matcha changes.
What should you check in the dry powder?
Check color, smell and texture side by side with your control under the same light, before any water touches it.
At a factory tasting table in Shibushi, Kagoshima, the dry leaf sat in black bowls right beside the white tasting cups. My bench test keeps the dry powder on the table the same way, and I look at it before I taste the cup.
Color
I put a pinch of each side by side on white paper, by a window. A 2026 review in Foods attributes matcha's bright green mainly to its high chlorophyll content and calls color a major factor in how people judge it; oxygen, light exposure and storage conditions add to pigment oxidation and color loss (Onder et al., 2026).
A sample duller than your control, olive or brownish, is the first warning. The review covers matcha in foods and processing, so color is a clue, not proof of age or grade.
Smell
Open both bags and smell straight away. My rule of thumb comes from tasting, not from a study: fresh, sweet and green beats flat, dusty or hay-like.
Texture
Rub a pinch between finger and thumb, then sift a dose of each and look at what stays on the mesh. Premium matcha is traditionally ground on slow granite stone mills, which keep heat down and preserve chlorophyll, volatile compounds and particle uniformity. Ceramic, jet or ball mills may generate more frictional heat, which can influence particle size, color stability and aroma (Onder et al., 2026).
Touch won't tell you the mill, but an uneven, gritty feel is a reason to ask the supplier how the matcha was milled.
Lot number and date
Last, check that the bag carries a lot or batch number and a production or best-by date. A sample speaks only for its own lot, so that number is what your quote and any lab report should name; for reading the date, see my matcha shelf-life guide.
How do you taste it straight, then in your drinks?
Taste the sample straight first, because water hides nothing, then in the drinks you sell, hot and iced, and last after it has sat.
Straight cup
Pull one 3 g shot each of sample and control, with the same water at the same temperature, and taste them warm. Our house shot uses water at 150 to 160°F (65 to 71°C) for hot drinks. Shading the tea plants suppresses catechins and raises chlorophyll, L-theanine and other free amino acids, which the review ties to the green color, fuller umami and lower astringency of high-quality matcha. The final grade also depends on cultivar, harvest timing and processing (Onder et al., 2026).
In practice, taste for savory depth and sweetness against bitterness and a dry, puckering finish (more on what good matcha tastes like).
Hot and iced lattes
Make two hot and two iced lattes of each, in your recipe with your milk. Look at the cup too: in my experience a strong matcha still reads green through milk, while a weak one goes pale or khaki.
Hold test
Matcha is ground leaf, so it spreads through liquid rather than dissolving, and it settles. My hold test: make one iced latte of each, let both stand ten minutes, then look at the bottom of the cup and taste the last sip. For a batch, see the hold limits in our matcha concentrate guide.
Day two
Pull one more shot of each the next day, with fresh palates, before you decide. A sample that wins on Monday and loses on Tuesday hasn't won yet.
How do you score the sample?
Score each round against the control, not against a number, and decide with the pass marks you wrote before tasting.
| Round | Compare against your control | Example pass mark (write yours first) |
|---|---|---|
| Dry color | Green on white paper, same light | As green as the control, or greener |
| Dry smell | Fresh and green versus flat or dusty | No stale note |
| Texture and sift | Grit between fingers, what stays on the mesh | No more residue than the control |
| Straight cup | Savory and sweet versus bitter and dry | Two of three tasters prefer it, or call it even |
| Hot latte | Tea comes through your milk | Still tastes of tea at your house dose |
| Iced latte | Flavor and color over ice | Green, not khaki, in the cup |
| Hold test | Last sip after ten minutes | No more sediment than the control |
| Cost per drink | Price per gram times grams per drink | At or under your target cost |
Work out cost per drink as grams per drink times price per kilogram, divided by 1,000. At 3 g a drink, a kilogram makes about 333 drinks. That puts our Latte Grade (Organic), at $100 to $145 per kg list price, at about $0.30 to $0.44 of matcha per drink, and Ceremonial (Organic), at $185 to $225 per kg, at about $0.56 to $0.68, before volume discounts.
Price the dose that tasted right: a sample that only wins at a heavier dose costs more per drink than its kilo price suggests.
How do you commit to the lot you tasted?
Ask which lot the sample came from, and get that lot, or the rule for replacing it, written into your quote before you pay.
Here's how I read a bench test: it proves a lot, not a supplier. The cup result is only as good as the promise that your order ships from the lot you tasted, and a sample bag makes no promise on its own.
Tight supply is why that promise matters. In February and March 2025, the Japan Tea Export Promotion Council's monthly export reports said domestic supply could not keep up with the overseas matcha boom, and in April the trade still could not take all the matcha orders it received. In June, short supply and rising prices affected the making of products for that year's new-tea reservations: some reserved orders could not be filled, and in some cases a substitute was offered in place of the regular product. Japan's House of Councillors research office summarized those reports in December 2025 (research office report, in Japanese).
The same paper puts the squeeze in numbers: production of tencha reached 5,336 tonnes in 2024, about 2.7 times its level ten years earlier, yet tencha is still only about 7.3% of Japan's tea production.
Ask these in writing:
- Which lot or batch is this sample from?
- How much of it is left?
- Will my order ship from it?
- If it runs out, will you send a sample of the next lot before it ships?
The answers depend on who actually holds the lot, and any lab report should carry the same number, because the COA has to match your lot.
When the order arrives, set a pinch beside your sealed reference on white paper, smell both, and pull one shot of each. Expect your reference to have faded a little in storage, so the warning sign is a delivery that looks duller or tastes flatter than it. If it does, tell the supplier that day, before you open more bags.
Our written quote holds for 21 days, so book the bench test for the first week after the samples arrive.
How does One with Tea send matcha samples to cafes?
One with Tea's wholesale matcha samples are free, one set per business, in every grade, as 30 g mylar bags: ask for them when you request a quote. The written quote follows the price sheet within 2 business days and includes the sample terms.
Minimum order is 1 kg. Latte Grade (Organic) and Ceremonial (Organic) are USDA Organic, certified by QCS, held in US inventory and ship in 2 to 3 business days. Superior and Royal come on request and are not organic certified.
For a milk drink, I'd compare Latte Grade (Organic) with Ceremonial (Organic) in your own milk. For a straight whisked drink, I'd compare Ceremonial (Organic) with Superior or Royal. Our lab results page explains what we test for, every report lists the product name and batch number, and wholesale buyers get the reports on request, so you can match the batch on your bag.
Over five weeks in Japan, I traveled across Shizuoka, Kyoto, Kagoshima, Fukuoka and the Mt. Fuji region, and I've tasted with producers at the edge of their fields in Shizuoka. Questions before you order? Write to me.
Whoever you buy from, taste first and get the lot named in writing. Request a quote and samples when you're ready.
Christian
Frequently Asked Questions
How much matcha do you need to test a sample?
A 30 g sample is enough at a 3 g shot: six tasting rounds use 22 g, the seventh is 8 g kept sealed, and the control rounds come from your current matcha. If a supplier sends less, cut the latte rounds first and keep the sealed reference, the one part you can't get back once the lot is gone.
Should you taste matcha samples blind?
Yes, in my view, because once tasters know which cup is the premium grade, the label starts voting before the tea does. Turn the key over only after every taster's sheet is filled in, so a premium label can't win a round it lost in the cup.
What color should a good matcha sample be?
Bright green, which a 2026 review in Foods ties mainly to chlorophyll, is what you hope to see, and dull, olive or brownish is the warning. I only judge it beside my control on white paper in the same light, never against a supplier's photo on a screen.
Does a good sample guarantee the matcha you receive?
No, a good sample speaks only for its own lot, and your order may ship from another unless the quote names the one you tasted. Keep the sealed reference until the first delivery passes a side-by-side check against it, since that check turns a good sample into a good order.
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