Preheat the oven to 350°F. Line a baking sheet with parchment paper or a silicone baking mat.
In a medium bowl, whisk together the flour, baking powder, baking soda, and salt.
In a separate bowl, cream together the butter and sugar until light and fluffy. Add in the egg and mix until combined.
Add in the tea leaves and mix until evenly distributed. Slowly add in the dry ingredients, alternating with the buttermilk or cream.
Once the dough is fully combined, scoop out tablespoon sized portions of dough and place on the prepared baking sheet. Bake for 10-12 minutes, or until lightly golden brown.
Remove from the oven and let cool on the baking sheet for 5 minutes before transferring to a cooling rack to cool completely.
Interesting Facts
Earl Grey tea was named after the 2nd Earl Grey, Charles Grey, who was a British Prime Minister in the 1830s.
The distinctive flavor of Earl Grey tea comes from the addition of bergamot oil, an essential oil derived from the rind of the bergamot orange.
Earl Grey tea is a popular choice for flavoring desserts, especially in Britain, as it pairs well with sweet flavors.