Preheat your oven to 180°C and line a cupcake tray with paper liners.
Heat the milk in a small saucepan until simmering. Add the Tetley tea bags and let it steep for 10 minutes. Remove the tea bags and set the milk aside to cool.
In a bowl, whisk together the flour, baking powder, salt, and chai spice blend.
In a separate bowl, cream the butter and sugar until light and fluffy. Beat in the eggs, one at a time, followed by the vanilla extract.
Gradually add the flour mixture, alternating with the cooled tea-infused milk. Mix until just combined.
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 centre comes out clean. Let the cupcakes cool completely on a wire rack.
To make the frosting, beat the butter until creamy. Gradually add the icing sugar and continue to beat until light and fluffy.
Mix in the cooled masala chai concentrate and vanilla extract until well combined.
Pipe or spread the frosting onto the cooled cupcakes.
Optionally, dust with a little extra chai spice blend for an added kick.
Enjoy your delicious chai cupcakes with a cup of your favourite tea!