Pre-heat oven to 175C
Sift flour, baking powder, baking soda and salt into a bowl.
Add sugar and combine.
Add butter and combine with a hand mixer or a whisk to create a fine crumb.
In a separate bowl, whisk together the egg, yogurt and oil.
Add the egg mixture to the dry ingredients and mix until just combined.
Add the vanilla to the milk and gradually add the milk into the bowl while whisking on low speed.
Beat until you have a smooth mixture; around 2 minutes.
Line a cupcake tray and fill* till about 3/4ths of the way up.
Bake at 175C for 18-20 minutes or until it passes the toothpick test!
Allow the cupcakes to cool in the tray for 10 minutes and then transfer onto a wire rack.
Decorate as you please or enjoy them as is!