You should use culinary grade matcha for baking.  Culinary grade matcha is great for baked goods, lattes and smoothies.  There are different grades of matcha and the two most common are ceremonial and culinary.  Ceremonial grade matcha is of the highest quality and is meant to be consumed by itself whisked in hot water.  Culinary grade matcha is meant to be mixed with other things like baking.  Because of the higher quality, ceremonial matcha is a brighter, more vibrant color and twice as expensive than culinary matcha.  Unless you’re looking for a specific color in your baked goods, I would save the money and just stick to culinary grade matcha.