preheat oven @ 180'c

sift together all the dry ingredients: flour, baking powder, baking soda and salt

cream together butter and sugar until light and fluffy

add in the eggs one at a time

mix together the milk yoghurt and vanilla extract

add in one third of the dry ingredients and then add n one half of the wet ingredients

repeat until all is combined and mix until you cannot see any streak of flour in the batter

line cupcakes pan with cupcakes liner. fill each cupcake liner with 1/4 cup batter

bake for 10-15 minutes or until golden brown. let the cupcakes cool to room temperature. use the butter frosting for icing

to make the frosting, mix the butter and vanilla extract. sift the icing sugar and add to the butter mixture slowly.