- By hand: sift the flour into a bowl and make a well in the middle. Break in the egg (and yolk, if using) and add a pinch of salt and a splash of the milk. Whisk the egg, gradually incorporating the flour, to make a smooth cream. Whisk in the rest of the milk and the melted butter.
- With a blender: put all the ingredients in a blender jug with a pinch of salt. Whizz until smooth.
Thanks to the Telegraph for doing most of the work for me
- Make a mess of the kitchen
- Add water and shake