Preheat oven to 170°C/ 340°F/ 160° FF and prepare your mini loaf tin by spraying it lightly with cooking spray
In the bowl of a stand mixer, combine the dry ingredients
In a small jug, combine the milk, eggs, oil and vanilla
Add the milk mixture from the jug to the dry ingredients, then mix on medium-high for 2 minutes, until light and fluffy
Gently stir through the boiling water, until combined. The mixture will be very thin
Pour mixture into prepared tin, filling each hole ¾ of the way, then bake for 25 minutes, or until a cake tester comes out clean
Cool in the pan for 20 minutes, then turn onto a cake rack to cool completely