1Preheat your oven to 350°F (175°C) and grease a loaf pan.
Heat the milk in a small saucepan over medium heat until it begins to simmer. Remove from heat and steep the Earl Grey tea bags in the milk for about 5 minutes. Remove the tea bags and let the milk cool.
In a mixing bowl, cream together the unsalted butter and granulated sugar until light and fluffy.
Add the egg to the butter and sugar mixture, and beat until well combined.
In another bowl, whisk together the all-purpose flour, baking powder, and salt.
Gradually add the dry ingredients to the wet ingredients, alternating with the cooled tea-infused milk, beginning and ending with the dry ingredients. Mix until just combined.
Pour the batter into the prepared loaf pan and smooth the top with a spatula.
Bake in the preheated oven for 30-35 minutes, or until a toothpick inserted into the center of the cake comes out clean.
Allow the cake to cool in the pan for 10 minutes, then transfer to a wire rack to cool completely before serving.