Preheat the oven to 325°F. Line an 8 by 8 inch baking pan with parchment paper.
The Batter
In a big-sized bowl, Sift the 180 g all-purpose flour, 10 g matcha green tea powder, and 1/4 tsp salt together until well-combined. Add the 70 g sugar and whisk to combine.
Grate the 170 g unsalted butter and add 1/2 tsp vanilla extract inside the big bowl and mix slowly.
Cut in the 80 g dark chocolate into small pieces.
Also cut and save 10 g dark chocolate to press into the tops of the bars right before baking for a prettier look.
The Baking
Combine every ingredient in the bowl.
Mix using your hands until you make a hard ball. This dough is very dry, so use the fingers and squish the butter to create a ball.
Press the dough into the prepared baking pan into an even layer.
Press the reserved 10 g dark chocolate into the top.
Bake for 25 minutes. You should see a nice golden coloration start on the sides.
Let cool completely on rack for 15 minutes, and cut into squares of your desired size. I cut them in 12 pieces (2 by 6 for bars or you can do 3 by 4 for rectangles).
The Serving
Serve and enjoy your Matcha Chocolate Bars [抹茶チョコバー] with a nice cup of tea, coffee or milk!