Preheat oven to 400ºF (200ºC).
Prepare a muffin tin by greasing the individual cups.
Mix together in a bowl, the cornflour, flour, sugar, salt and baking powder.
In a separate bowl whisk together the egg, milk, yogurt and vegetable oil.
Add the wet mix to the dry and stir until well incorporated, but do not over mix. It is ok if you have a few random lumps.
Use an ice cream scoop to measure out the batter into the muffin cups.
Bake in the oven for 15 minutes or until a toothpick inserted in the center of the muffin comes out clean.
Once removed from the oven, allow the muffins to cool for ten minutes before turning them out onto a cooling tray.