Step 1

Preheat oven to 375°F. Pulse together all the dry ingredients in a food processor until the tea leaves are pulverized.

Step 2

Add vanilla, water, and butter. Pulse together until a dough is formed. Form the dough into a log onto a piece of wax or parchment paper. Wrap the paper around and roll the log smooth. Freeze now, or chill for at least 30 minutes.

Step 3

When chilled, slice the log into 1/3 inch thick pieces. Place on baking sheets and bake until the edges are just brown, about 12 minutes. Let cool on sheets for 5 minutes, then transfer to wire racks.