Earl Grey Shortbread Cookies

1 cup butter, room temperature
1 tsp vanilla extract
3/4 cup powdered sugar
2 cups flour
2 Tbsp loose Earl Grey tea
1/2 tsp salt

1. Put butter, vanilla extract, and powdered sugar into a large bowl. Beat until light and fluffy. Add flour, tea, and salt. Mix until a dough is formed.
2. Roll dough into logs (1″ thick or so) and tightly wrap in plastic wrap. Chill in fridge for at least 30 minutes.
3. Preheat oven to 375F.
4. Slice logs into thin disks (2mm or so) and place on parchment lined baking sheets. Bake until edges are just brown, about 12 minutes. Let cool for 5 minutes, then transfer to wire racks to finish cooling.