Preheat your oven to 350°F (175°C) and line a cupcake tin with paper liners.
In a mixing bowl, whisk together the flour, sugar, baking powder, baking soda, salt, and chai spice mix.
Add the softened butter and mix until the mixture resembles coarse crumbs.
Beat in the eggs one at a time, then add the vanilla extract.
Gradually add the milk and mix until smooth.
Divide the batter evenly among the cupcake liners, filling each about ⅔ full.
Bake for 18-20 minutes, or until a toothpick inserted into the center comes out clean.
Allow the cupcakes to cool in the tin for 5 minutes, then transfer to a wire rack to cool completely.