Preheat your oven to 180c/160c fan/350f/gas mark 4.
Fill a 12 hole muffin tray with muffin or cupcake cases.
Pour milk into a mixing bowl, add the vinegar and stir. Leave for a few minutes.
Add the oil to the milk and stir.
Add the sugar, salt and ginger to the milk, then add the flour, cornstarch and baking powder.
Fold to mix (as little as possible), then scoop into the cupcake or muffin cases.
Bake for 20-25 minutes until risen and baked through. Use a skewer to see if they are ready.
Remove from the oven, leaving the muffins in the tray for a few minutes, before moving them to a baking rack to cool completely.
Enjoy!
Notes
Use a skewer or toothpick to see if they are ready. Insert it into a muffin, if it comes out clean they are ready, if there is batter on it they need a little longer.
The muffins can be kept in an airtight container for 3 days. If you pop the box in the fridge when they are cool, you will get another couple of days out of them.
The muffins can be frozen in a freezer bag for up to 3 months. Defrost at room temperature.