Make sure your butter is very soft and cream that first.
Add the sugar and mix till it’s quite pale.
Then add the oil and vanilla paste. Mix till well combined.
Add egg and a spoonful of flour and mix until it’s combined.
Repeat adding egg and flour until all is incorporated.
Turn the mixing speed down and mix through the remainder of the flour and a pinch of salt.
Add 50 ml of milk to loosen it.
Don’t over mix it.
You are then ready to bake.
