125 grams (1 cup) plain flour, ¼ teaspoon table salt, 115 grams (1/2 cup; 1 stick) good quality unsalted butter at room temperature, 30 grams (1/4 cup) confectioners ’sugar, 1 tablespoon green tea leaves (from about 3 tea bags). Whisk together flour and salt in a small bowl. Set aside....