In a large bowl combine your powdered sugar, flour, and salt. Cut in your butter using a pastry cutter until your mixture resembles wet sand.
Add your lemon zest and tea leaves.
Knead the dough using your hands until the dough comes together. It may seem dry to you but this is what it is supposed to be.
Using a rolling pin, roll out your dough to about ½ inch thick.
Using a small biscuit cutter or cookie cutter, cut out your cookies. Re-knead your scraps and repeat.
Using a spatula, place your cookies on a cookie sheet (with parchment paper).
Place your cookies in the freezer for 15 minutes (do not skip this step). Preheat your oven to 325 degrees.
Bake your cookies for 12 minutes.