Ceremonial grade matcha powder is a high quality matcha meant for drinking as is where the flavour shines on its own. It has a very vibrant green colour and tastes sweet and fragrant. Culinary matcha is a lower grade matcha that is meant to be used in baked goods where it is mixed with other ingredients and exposed to high heat. It is usually a brownish-green colour and can taste bitter on its own. I always prefer to use ceremonial grade matcha powder in both drinks and baked goods for a much better flavour and colour.