What's the flavor of the green part?

(Green tea cookies & Roasted tea)

I have a party tomorrow because the class that I attend
more than a year is last of this semester.
I usually bring homemade cookies, chocolate chip
or Earl Gray cookies.

First I thought to make Japanese food using soy sauce,
but some people might not like soy sauce taste.
However, I wanted to bring Japanese style foods.
Hmmm... what should I make?

I totally forgot there was the representative Japanese flavor
because it was hard to get the candies of this flavor
at the supermarket in US.
Also, I remembered to bring the ingredient of this flavor
when I had gone back to Japan temporary.

I made the two-colored cookies using this stuff.
Do you know what flavor the green part is?
I suppose it's easy for my Japanese friends to understand it.

The flavor is "Matcha" that is powdered green tea.
In Japan, there are many kinds of Matcha-flavored candies,
ice cream, cake, pudding, cheesecake etc...

I'm a little nervous if everyone of the class like my Matcha cookies.