Earl Grey Tea Cookies

These are from Martha Stewart.
Makes about 8 dozen

Ingredients

2 cups all-purpose flour, plus more for dusting
2 tablespoons finely ground Earl Grey tea leaves, (from about 8 bags)
1/2 teaspoon salt
2 (8 ounce) sticks unsalted butter, softened
1/2 cup confectioner's sugar
1 tablespoon finely grated orange zest

Directions
Whisk together flour, tea, and salt in a small bowl; set aside.

Put butter, sugar, and zest in the bowl of an electric mixer. Mix on medium speed until pale and fluffy, about 3 minutes. Reduce speed to low; slowly mix in flour mixture until just combined.
Divide dough in half. Transfer each half to a piece of parchment paper; shape into logs. Roll in parchment to 1 1/4 inches in diameter, pressing a ruler along edge of parchment at each turn to narrow log and force out air. Transfer in parchment to paper-towel tubes; freeze 1 hour.
Preheat oven to 350 degrees. Cut logs into 1/4-inch-thick slices. Space 1 inch apart on parchment-lined baking sheets.

Bake until edges turn golden, 13 to 15 minutes. Let cool on sheets on wire racks.