June 22nd, 2009 by hennie

FOR THE CRUST
85ml butter melted, plus extra for tin
140g digestive biscuits , made into fine crumbs
1 tbsp sugar , granulated or golden caster
FOR THE CHEESECAKE FILLING
3 x 300g pack full fat soft cheese
250g golden caster sugar
3 tbsp plain flour
1½ tsp vanilla extract
finely grated zest of 1 lemon (about 2 tsp)
1½ tsp lemon juice
3 large eggs , plus 1 yolk
200ml soured cream
FOR THE SOURED CREAM TOPPING
226ml soured cream
1 tbsp golden caster sugar
2 tsp lemon juice
Position an oven shelf in the middle of the oven. Preheat the oven to fan 160C/conventional 180C/gas 4. Line the base of a 23cm springform cake tin with parchment paper.
For the crust, melt the butter in a medium pan. Stir in the biscuit crumbs and sugar so the mixture is evenly moistened. Press the mixture into the bottom of the pan and bake for 10 minutes. Cool while preparing the filling.
For the filling, increase the oven temperature to fan 200C/conventional 240C/gas 9. Blend the soft cheese until creamy. Gradually add the sugar, then the flour and a pinch of salt. Now add the vanilla, lemon zest and juice. Mix in the eggs and yolk, one at a time. Stir the soured cream until smooth then add the soured cream. Whisk to blend, but don’t over-beat. The batter should be smooth, light and somewhat airy.
Brush the sides of the springform tin with melted butter and put on a baking sheet. Pour in the filling - if there are any lumps, sink them using a knife - the top should be as smooth as possible. Bake for 10 minutes. Reduce oven temperature to fan 90C/conventional 110C/gas 1⁄4 and bake for 25 minutes more. If you gently shake the tin, the filling should have a slight wobble. Turn off the oven and open the oven door for a cheesecake that’s creamy in the centre, or leave it closed if you prefer a drier texture. Let cool in the oven for 2 hours.
Combine the sourd cream with the sugar and lemon juice for the topping. Spread over the cheesecake right to the edges. Cover loosely with foil and refrigerate for at least 8 hours or overnight.