Preheat your oven to 350°F (175°C) and line a muffin tin with cupcake liners.
In a mixing bowl, whisk together the flour, baking powder, cinnamon, ginger, cardamom, and salt.
In another bowl, beat the butter and sugar until light and fluffy. Add the eggs one at a time, beating well after each addition.
Mix the chai tea leaves into the milk. Gradually add the dry ingredients to the butter mixture, alternating with the milk mixture, beginning and ending with the dry ingredients.
Divide the batter evenly among the cupcake liners, filling each about two-thirds full.
Bake for 18-20 minutes, or until a toothpick inserted into the center comes out clean. Allow to cool completely before frosting.