1Preheat your oven to 160°C (320°F).
In a mixing bowl, combine the cream cheese and sugar. Beat until smooth and creamy.
Add the eggs one at a time, beating well after each addition.
Stir in the vanilla extract and a pinch of salt.
In a separate bowl, mix the flour and hot chocolate mix.
Gradually add the dry ingredients to the cream cheese mixture, stirring until just combined.
Melt the butter and add it to the mixture, stirring until smooth.
Pour the mixture into a greased and lined baking tin.
Use a knife to swirl the mixture to create a marbled effect.
Bake in the preheated oven for 45-50 minutes or until the center is set.
Allow the cheesecake to cool in the oven with the door slightly open, then refrigerate for at least 4 hours before serving.