I love finding ways to bake with green tea powder called matcha in Japanese. Matcha does have a bitter taste but it matches well with many sweets such as white chocolate and fresh cream. Also, you don't need to use heaping teaspoons of it in recipes but just enough for a balanced flavor. This recipe has several steps but it is a great dessert to impress your friends.
By the way, this cake goes great with coffee. You don't need to worry that the matcha and coffee don't match, the sweetness of the chocolate is the dominate flavor in this dessert.