1.1 Preheat Oven + Prep Ingredients
Preheat the oven to 200°C (390°F), using both top and bottom heat, for 10 minutes (The oven must be fully preheated for even baking).
In a large, clean, grease-free bowl, place the 240g of softened cream cheese. Mix with a spatula for 1 minute until smooth and creamy (no noticeable lumps).
1.2 Make the Cheesecake Batter
Add 45g of fine sugar to the cream cheese. Continue mixing with the spatula for 30 seconds until the sugar is completely dissolved (test by feeling for granules with your finger).
Add eggs one at a time: Add the first egg and mix for 30 seconds until fully incorporated. Then add the second egg and mix until the egg is fully combined with the batter (Adding them one by one prevents the batter from splitting).
Pour in the 80ml of heavy cream. Use the silicone spatula to fold until combined (The batter should be fluid and smooth).
Make matcha paste: In a small bowl, place the 8g of matcha powder. Add the 20-30ml of hot milk. Quickly stir with a spoon until the matcha is completely dissolved and smooth (sift if any clumps remain). Pour the matcha paste into the cheesecake batter. Use the spatula to fold until the batter is a uniform light green.
Finally, add the 4g of cornstarch. Use the spatula to fold it in from the bottom up, ensuring it is fully incorporated (Avoid vigorous stirring in circles to prevent developing gluten).
1.3 Bake and Set
Pour the batter into the prepared 6-inch pan lined with parchment paper.
Gently smooth the surface with the spatula. Then, tap the pan firmly on the counter 3-5 times to release air bubbles (bubbles cause an uneven surface).
Place the pan on the middle rack of the preheated oven. Bake at 200°C (390°F) for 35 minutes (Do not open the oven door frequently during baking, as sudden temperature drops can cause the cake to collapse).
Bake until the surface is slightly caramelized and the edges are puffed. A skewer inserted into the center should come out with some moist crumbs (not liquid batter). Remember, Basque cheesecake is meant to be slightly wobbly in the center.
Remove the cake and let it cool completely on a wire rack to room temperature (about 1 hour. It MUST be completely cool before adding the next layer).