For the cookie dough:

100g butter, melted
250ml brown sugar (I used muscovado which gave a slightly coffee-like flavor to the dough)
100ml caster sugar
4 tablespoons milk
500ml all-purpose flour
1 tablespoon vanilla extract (I left this out)
pinch of salt

Mix all the ingredients together into a smooth dough (add the flour in the end). Add in chocolate chips, cacao nibs etc. if you like.

For the cheesecake mixture:
225g Philadelphia creme cheese
50ml caster sugar
1 egg
1 tablespoon fresh lemon juice
Whisk together all the ingredients until silky in texture.

For the brownie mixture:
100g + one tablespoon butter
125g bittersweet chocolate
100ml caster sugar
1 teaspoon vanilla extract (I left this out)
1/4 teaspoon salt
1 large eggs
125ml all-purpose flour