Set aside a good-sized, microwaveable mug to bake the cake in. Add the butter and milk to another microwaveable mug and microwave on high in 10 second increments, swirling the contents after each ...
Carefully fold in the remaining flour using a large metal spoon, then fold in the yoghurt and vanilla extract until ... metal skewer into the centre of the cake. If it comes out clean, the cake ...