In a small bowl whisk all-purpose flour and salt. Set aside.
Use a hand mixer or a stand mixer fitted with the paddle attachment to cream the softened butter, granulated sugar, matcha powder and vanilla extract until light and fluffy.
Add the dry ingredients all at once then mix on low speed until just combined.
Divide dough in half then shape into flat discs. Wrap each tightly with plastic wrap then refrigerate for at least 1 hour or up to 3 days.
Preheat oven to 325°F and line baking sheets with parchment paper or silicone baking mats.
On a floured surface, roll out one disc of dough to about 1/4 inch thick. Cut out cookies and place on a baking sheet then freeze for at least 5 minutes.
Bake cookies for 12 minutes or until the edges begin to lightly brown then allow to cool completely (my cookies were 2 inches but you may have to adjust the baking time if your cookies are smaller/larger). Repeat with the second disc of dough. You can reroll the dough scraps up to 2 more times. If desired, decorate cookies with melted white chocolate.
Notes
Weigh your ingredients using a kitchen scale! Measuring ingredients by volume is not accurate.
Butter: I recommend using unsalted butter. You can use salted butter, just be sure to omit the 1/2 tsp salt.
Store Matcha Shortbread Cookies in an airtight container for up to a week at room temperature.
Matcha shortbread dough wrapped tightly in plastic wrap and placed in a zip-top bag can be frozen for up to 3 months. Thaw in the fridge overnight before rolling and baking.
Nutrition: the provided nutritional information is an estimate per serving. Please read my Nutrition Disclaimer for more information.