Make sure all ingredients are at room temperature.
In a medium mixing bowl, mix the ricotta cheese and the sugar.
Add the eggs to the mixture and mix until well combined.
Add the cocoa powder, cinnamon, and vanilla extract. Mix well.
First, melt the chocolate in the bain-marie and let it cool to room temperature. Then, pour it into the cheese mixture until you see it homogeneous.
Pour the chocolate and ricotta mixture into your springform pan and bake at 180 degrees Celsius for 45 minutes.
Turn off the oven, open the door a bit and let it cool for 20 minutes with the cheesecake inside.
Remove from the oven and let cool down at room temperature.
Unmold your cheesecake and garnish with your favorite topping, cut in 8 slices, serve, and enjoy!