Step 1

Preheat oven to 325 degrees, with racks in upper and lower thirds. In a bowl, whisk together both flours, tea, salt, pepper, and spices. In another bowl, beat butter with sugar on medium speed until light and fluffy, about 3 minutes. Beat in vanilla. Reduce speed to low; gradually add flour mixture, beating just until a dough forms. Roll level tablespoons of dough into balls. Place 1 inch apart on 2 parchment-lined baking sheets.

Step 2

Bake, rotating rack positions once halfway through, until cookies are set and golden on bottoms, 15 to 18 minutes.

Step 3

Let cool on sheets 5 minutes. Roll in confectioners' sugar; let cool completely on a wire rack. Generously coat in more confectioners' sugar before serving, or store in an airtight container at room temperature up to 2 weeks.