Preheat oven to 350F. Line sheet pan with parchment paper or silpat. Combine the confectioner’s sugar and green tea together in a bowl. Add butter in the tea/sugar mixture to the bowl of a stand mixer fitted with the paddle attachment. mix until smooth and light in color. add the flour and mix until well combined, add the egg yolks and mix until eggs are fully incorporated in to the dough. form the dough into a disk and chillin in the refrigerator until firm. roll out the dough and and cut the dough with cookie cutter. toss each cookin in a bowl of granulated sugar to coat (i partially coated my cookies). place the cookes on the sheet pan and bake the cookes at 35oF for 12-15 minutes, or until slightly golden around the edges.