Heaven in a mug!
In a small pan or a bowl in the microwave, gently melt together the peanut butter and chocolate then very gradually add the milk (preferably warmed) and mix until combined and steaming hot.
Pour into your favourite mug and enjoy.
* Do not just add all the cold milk to the melted chocolate as this will cause the chocolate to solidify leaving you with floating little lumps of chocolate and not a smooth, rich, creamy hot chocolate.