Step 1

Preheat oven to 325 degrees F. Grease baking sheets or line with parchment paper.

Step 2

Sift flour, matcha, baking soda and salt together in a bowl. Beat brown sugar, butter and white sugar together in a large bowl using an electric mixer until blended; beat in vanilla extract, egg and egg yolk until light and creamy.

Step 3

Mix flour mixture into creamed butter until dough is just blended; fold in white chocolate using a wooden spoon. Drop cookie dough, 1 heaping tablespoon per cookie, onto the prepared baking sheet 2 to 3 inches apart.

Step 4

Bake 8 to 10 minutes, or until edges are lightly browned. Cool cookies on baking sheet for 3 minutes then transfer to rack to cool completely.