Preheat the oven to 350°F (175°C).

In a mixing bowl, whisk together the flour, baking powder, salt, and crushed Earl Grey tea leaves.

In another bowl, cream the softened butter and granulated sugar until light and fluffy.

Add the egg and vanilla extract to the butter mixture and mix until combined.

Gradually add the dry ingredients to the wet ingredients, mixing until just combined.

Scoop tablespoon-sized portions of dough and roll them into balls.

Place the dough balls on a baking sheet lined with parchment paper, spacing them about 2 inches apart.

Flatten each ball slightly with the bottom of a glass.

Bake in the preheated oven for 10-12 minutes or until the edges are lightly golden.

Remove from the oven and let cool on the baking sheet for a few minutes before transferring to a wire rack to cool completely.