Pre-heat the oven to 175ºC (350ºF) and prepare two 6 inch (18cm) pans.
Cream the butter, sugar and Daim "powder" together until light and fluffy.
Beat in the eggs and then the butterscotch and dark syrup.
Finally, mix in the milk, vanilla and Greek yoghurt.
In a separate bowl, combine the flour, baking powder, and baking soda and then stir into the wet ingredients.
Pour into the prepared pans and bake for around 30-35 minutes. The cakes are ready when an inserted skewer comes out clean.
Let the cakes cool a little before turning out onto a wire rack, then allow them to cool completely.