Keep the oven temperature at 160ºC/ 325ºF conventional oven.
Split a vanilla bean pod in half by cutting it lengthwise. Scrape out the vanilla bean with a knife. Out of the 200g (1 cup) of sugar take 1 tablespoon out of it and add it to the cutting board. With the knife, rub the sugar and vanilla bean together until well combined and fragrant.
1 vanilla bean
In a bowl of a stand mixer, using the paddle attachment, or using a hand mixer cream the cream cheese for 1 minute on low speed. Then gradually add the granulated sugar. Once all the granulated sugar is added, scrape down the sides of the bowl and add the vanilla bean sugar and let it mix for 1 minute on low speed.
600 g cream cheese, 200 g granulated sugar
In a small bowl, mix together the sour cream and cornstarch until smooth. Add it to the cream cheese and let it mix on low speed until combined. Then add one egg at a time and let it mix on low speed until combined. Once all the eggs have mixed in, scrape down the sides of the bowl and give it a final mix to make sure all the ingredients have incorporated.
150 g sour cream 18%, 1 tablespoon cornstarch, 3 large eggs
Pour the cheesecake batter into the spring pan.
Boil up water in a kettle. Place the springform pan in a 25 cm/10 inch cake pan. Place the cake pan in another baking pan or roasting pan and fill it with hot water ⅔ up the side of the pan. This method will prevent water from getting into the crust.
Alternatively, add a triple layer of aluminium foil around the cake pan to safely seal it from the water before placing it in a water bath. There might be a possibility of water leaking in, so make sure it's covered well if choosing this method.
Bake for 1 hour and 10 min.
Once the time has passed, give the tray a very gentle shake. The cheesecake should still be a bit wobbly in the middle. Turn off the oven and have the oven door slightly open and let the cheesecake cool down in the oven for 1 hour.
Then take it out of the oven and remove it from the water bath. Take off the aluminium foil and place the cheesecake on a cooling rack. Let it cool down for 1 hour to room temperature. Once at room temperature, place it in the fridge, covered with plastic wrap. Let it chill for at least 6 hours, preferable overnight.