Preheat oven to 350 degrees Fahrenheit.

Beat butter, 1/2 cup powdered sugar, crushed tea, and vanilla until smooth.

Gradually add flour until dough forms.

Roll into 1-inch balls; place on a baking sheet and flatten slightly with a glass bottom.

Bake 10 to 12 minutes, until bottoms are light brown; cool.

Mix remaining powdered sugar and milk into glaze; drizzle over cooled cookies.