Prepare a 7-inch spring form pan by lining it with parchment paper. Preheat the oven to 340F (170C ).
Melt the white chocolate in a heatproof bowl over a pot of simmering water or in the microwave. Allow it to cool slightly.
Separate the egg whites and yolks. Beat the egg whites until stiff peaks and set aside.
Whip the softened cream cheese using an electric or hand beater for several minutes until it becomes smooth and creamy. Then, gently blend in the melted white chocolate and egg yolks until they are fully combined.
Incorporate the whipped egg whites into the mixture by gently folding them in three separate batches until they are fully combined.
Pour the cheesecake batter into the prepared spring form pan. To prevent excessive browning, wrap the outer sides of the spring form pan with aluminum foil.
Place the wrapped spring form pan inside a larger pan, and add hot water to the larger pan to create a water bath for baking.
Carefully place the pan in the oven and bake for 15 minutes at 340F.
After 15 minutes reduce the heat to 320 F and bake for another 15 minutes.
When done baking, turn off the oven and leave the cheesecake in the oven for 30 minutes.
Allow it to chilled in the refrigerator for few hours or even overnight before serving. Dust the top with powdered sugar