Preparation:
- Preheat the oven to 320°F (160°C).
- Line the bottom of an 8-inch diameter circular cake pan with parchment paper and lightly butter the edges.
- In a heatproof bowl, combine cream cheese, milk, and butter. Place the bowl over a pot of simmering water to create a double boiler. Stir until smooth, then remove from heat and let it cool slightly.
Step 1:
- Sift together cornflour and cake flour in a separate bowl and set aside.
- In a large bowl, whisk the egg yolks until pale and fluffy.
- Gradually add the cream cheese mixture to the egg yolks, whisking until well combined.
- Gently fold in the sifted flours until smooth and lump-free.
Step 2:
- In another clean mixing bowl, whip the egg whites into a froth. Add cream of tartar (if using) and beat until soft peaks form.
- Gradually add granulated sugar to the egg whites, beating until stiff peaks form.
- Carefully fold the egg white mixture into the cream cheese batter in three parts without deflating the mixture.
Baking:
- Pour the batter into the prepared cake pan.
- Tap the pan gently on the counter to remove any trapped air bubbles.
- Place the cake pan in a larger baking pan and create a water bath by adding boiling water to the larger pan.
- Bake in the preheated oven for 60-70 minutes until the top is golden brown and a skewer comes out clean.
Cooling and Serving:
- Leave the cake in the slightly ajar oven for 15 minutes to cool gradually and prevent temperature fluctuations.
- Remove the cake from the oven and water bath, then cool it completely on a wire rack in the pan.
- Carefully remove the cake from the pan once cooled.
- Dust the top of the cheesecake with powdered sugar before serving.
- Slice and enjoy your light and airy Japanese cotton cheesecake!