These are super soft banana cupcakes but the best bit is the amazing caramel topping or as it is known in Spain 'dulce de leche' a creamy caramel icing.
If you cannot or do not want to get butter milk an alternative can be made. Mix 125 milk and yoghurt to make 350ml; combine well.
Milk Caramel is prepared by slowly heating sweetened milk or condensed milk until it turns brown, this caramelising process is where it gets its taste from. It can be purchased in a tin at your local supermarket.