Oreo Philly Cream Cheese Cake

This Oreo Cheese Cake with White Chocolate Topping are soft and tasted like NY Cheese cake. If you don't like Oreo, may substitute for digestive biscuits instead. I half the portion of the original recipe from www.dennyfoodandrecipes.blogspot.com. For the white chocolate topping, I uses Ghiradelli semi-sweet chocolate chip. They tasted like condensed milk but the hardened version.

Here's the recipe:
6 x 6 inch non-stick square baking pan

24 Oreo cookies, divided into 18 + 6
60 gm butter, divided into 30gm + 30gm
2 box Philadelphia Cream Cheese, 8 oz each
1/2 cup white fine sugar
1/2 cup light sour cream
1/4 tsp vanilla
2 large eggs
100 gm White Chocolate Semi-sweet

Directions:

1. Heat oven to 160 degC. Line baking pan with foil or baking paper, with ends extending over side of pan for easy lifting of cake later.
2. FINELY CRUSH 18 cookies without cream using a grinder. 
3. Medium bowl: Melt 30 gm butter + cookies cream. Add in crushed cookies and mix well. Press onto bottom of prepared pan evenly.
4. Large bowl: Electric whisk - beat cream cheese and sugar until blended. Add sour cream and vanilla; mix well. Do not over stir as it will cause the cheese cake to crack when baking.
5. Add eggs, 1 at a time, beating after each addition until just blended.
6. Chop remaining 6 Oreo cookies. Using Spatula, gently stir it into batter; pour batter over crust in pan.
7. To bake - Place a baking pan half-filled with hot water on the bottom rack of oven while cheesecake bakes on middle rack. Bake for 45 mins at 160 degC. Cheesecake is baked when center is almost set. Off the oven and leave cheesecake in oven to cool . The cheesecake will continue to baked at this stage (around 10-15 mins) DO NOT open oven door when baking cheesecake as this will make the cheesecake flop in the middle.
8. For Topping - microwave chocolate and remaining 3 gm butter; stirring until smooth. Cool slightly and spread over top of Cheesecake. Refrigerate for 4 hours. Use foil/baking paper handles to lift Cheesecake from pan before cutting into smaller square to serve.