In a large bowl or stand mixer, combine the flour and butter
Mix in matcha powder, sugar, eggs, and salt. Beat until combined and a dough has formed.
Mix in white chocolate chips
Form your dough into a log and place it in the fridge or freezer for 30 minutes
Preheat oven to 350°F (175°C) and line a baking sheet with parchment paper
Remove your dough from chilling. Slice into cookie-size pieces, about ¼ inch thick. Arrange on baking sheet, allowing an inch between each piece.
Bake for 10-15 minutes, or until cookies are just set
Remove from oven and allow to cool on wire rack for 5-10 minutes before serving