Preheat oven to 330°F/165°C fan. Grease and line a 9-inch (23 cms) springform pan and set aside.
Cookie crumb base
In a medium bowl, mix 200 g crushed cookies and 5 tablespoons melted butter. Press the mixture into the bottom of lined springform pan, ensuring it rises up ½ inch round the sides.
Bake in oven for 3 minutes, then remove and set aside.
The filling
In a large bowl, mix t800 g cream cheese, full fat with 300 g sugar till smooth.
Blend in 180 ml milk, 240 g sour cream, 1 tablespoon vanilla extract, ⅛ teaspoon salt and 30 g cornstarch.
Add 4 medium eggs and slowly mix well till well incorporated, then pour the mixture into the crust. Bake in the preheated oven for 1 hour.
Turn the oven off and leave the cheesecake for another 30 minutes. Remove from the oven and leave to cool on the counter then cover and chill in the refrigerator overnight. Serve chilled or at room temperature.
Notes
Helpful tips for best results
Removed all the chilled ingredients from the fridge an hour in advance to bring to room temperature before using, for better mixing.
most cookies will work for the crumb such as graham crackers, shortbread, digestive cookies, oreos or ginger nut cookies.
use a full fat unflavoured cream cheese
Troubleshooting
For a springform pan that may leak:
Grease the inside of the pan and line with parchment or baking paper.
Cut the paper so it is large enough to hang over the sides then scrunch it up so it is creased. This, and the greased sides will make it easier to cling to the edges of the pan.