Adding a touch of tea to breakfast does not require dyeing an entire bowl of porridge deep green. The heavier the hand with matcha, the quicker bitterness comes to the fore; start with a delicate, pale bowl, then adjust upward to taste.
For a single portion, start with 40 g of rolled oats, 150 ml of dairy or plant-based milk, and 1 g of matcha. Cook or soak the oats according to packet instructions until the desired texture is reached. Separately whisk the matcha with roughly 15 ml of warm water until smooth, then fold it into the oats once they are no longer piping hot. Taste it plain first; if sweetness is needed, incorporate a small amount of banana or honey, and add fresh berries just a few at a time to prevent sharp fruit acidity from overpowering the tea aroma.
Identifying where bitterness originates
If the mouthfeel is powdery, check whether the matcha was sifted beforehand and whisked into a smooth paste; if there is merely a bitter aftertaste, halve the amount of powder next time rather than simply adding more sugar. Switching milk or oat brands will also alter the sweetness, so it is best to adjust only one ingredient at a time. When making overnight oats, refrigerate them in line with the food safety requirements for your milk, fresh fruit, and containers, rather than using this recipe to infer shelf life.
Jiang Rong Hao currently categorises matcha by ceremonial whisking, beverage, and culinary applications; when making oats, you can start by sampling and comparing culinary or beverage options. These denote brand product applications rather than legally defined food standard grades. Allergen advisories for dairy, nuts, or oats should be checked against the actual ingredients used.