A bitter bowl of matcha almost always comes down to one of four things: water that's too hot, too much matcha for the cup, the wrong grade for the job, or matcha that's been stored badly. Good matcha shouldn't taste harsh. It should taste creamy, smooth, and naturally sweet with a soft umami body. If yours is sharp, chalky, or bitter, something in the brewing or the matcha itself is off. The good news is, all four causes are fixable.

Cause one: water too hot

This is the most common reason for bitter matcha. Boiling water scorches the leaf compounds, pulls out tannins, and floods the cup with astringency. The fix is simple: bring water to 75 to 80 degrees Celsius before whisking. Boil your kettle, then let it sit on the bench for 60 to 90 seconds before pouring. If you have a temperature controlled kettle, dial it to 75. A small splash of cold water added to a fresh boil also works.

Cause two: too much matcha for the cup

More matcha doesn't mean better matcha. Most home setups need 2 to 4 grams of powder per cup, depending on whether you're making a traditional bowl or a latte. Beyond 5 grams, the cup gets dense, chalky, and increasingly bitter as the tannins overwhelm the sweetness. Stick to a teaspoon or two for daily drinking. Less is often more.

Cause three: wrong grade for the job

Matcha grades exist for a reason. Culinary grade matcha is made for cooking, baking, and recipes where the matcha is one ingredient among many. It has a stronger, more grassy, more bitter flavour profile because that's what you need to cut through sugar, dairy, and heat. Drinking culinary grade straight or in a latte will taste sharp and bitter, because it wasn't built for that.

Ceremonial grade matcha is the right tool for daily drinking. The leaves are younger, the harvest is the spring first flush, the shading is longer, and the milling is finer. The result is a softer, sweeter, smoother cup that doesn't need sugar or sweetener to enjoy. If you're drinking matcha pure or as a latte and it tastes bitter, switching to a proper ceremonial grade fixes the problem fast.

Cause four: storage and freshness

Matcha is delicate. Heat, light, oxygen, and moisture all degrade the flavour over time. A can of matcha that's been sitting on a sunny benchtop for two months, or one that's been left open between uses, will taste flatter, harsher, and less sweet than a fresh can.

The fix: store matcha in a cool, dark place, sealed when not in use. Once opened, drink it within 30 days for the best flavour. Unopened, ceremonial matcha is generally good for around 12 months from the manufacture date.

If you've covered all four causes and your matcha still tastes bitter, the issue might be the matcha itself. Cheap supermarket matcha and unbranded bulk matcha is often older, lower grade, or harvested poorly. Quality varies enormously across the market.

Teafy's Ceremonial Grade Matcha Powder is hand picked spring first flush, shaded 20 to 25 days, bead milled cool, and held at 0 to 4 degrees in our Melbourne cold room until your order ships. The cup should taste creamy and naturally sweet with no harsh edge. If yours doesn't, we want to know.

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You might also like:

• ‍What's the right water temperature for matcha?
• What's the difference between ceremonial and culinary matcha?
• How do I store matcha properly?