Steps
1. Preheat your oven to 325°F (160°C).
2. In a bowl, mix the cream cheese, sugar, coffee granules, vanilla extract, and egg yolk until smooth.
3. In a separate bowl, combine flour, brown sugar, melted butter, and cinnamon to create the crumble mixture.
4. Pour the cheesecake mixture into a small oven-safe dish.
5. Sprinkle the crumble mixture on top of the cheesecake.
6. Bake for 20-25 minutes, or until the cheesecake is set and the crumble is golden brown.
7. Allow to cool slightly before serving for a perfect creamy texture.