A creation compiled by me along with two giants in the cooking world.
NOTE: to make things easier, make the cheesecake and crust on one day and the mousse and ganache on the next day. Cheesecake lasts longer than mousse. Keep this cake refrigerated and will last up to 2-3 days but is best eaten the day it’s made.
Layer 1: Oreo Cookie Crust
30-32 Oreo cookies (or chocolate sandwich cookies) for a high crust
4 Tbsp unsalted butter (1/2 stick), melted
1-2 tsp espresso powder (optional)
Crush cookies in a food processor or in a ziploc bag with a rolling pin or mallet. In a bowl or food processor, pour melted butter on top of the crushed cookies and add the espresso powder (optional), and mix or pulse well. Place the oreo mixture at the bottom of a springform pan. Smooth out the mixture with the bottom of a measuring cup or glass. Wrap the bottom of the pan in a double layer of aluminum foil. Place the crust in the freezer while you make the cheesecake.
For the cheesecake:
1 pound (two 8-ounce boxes) cream cheese, at room temperature
2/3 cup granulated sugar
1/4 teaspoon salt (I always use kosher salt)
1 teaspoon pure vanilla extract
2 large eggs, at room temperature
2/3 cup heavy cream (or sour cream or combination)
Put a kettle or pot of water on to boil. Preheat the oven to 325 degrees Fahrenheit.
Working in a stand mixer (or large bowl with hand mixer), preferably fitted with a paddle attachment, beat the cream cheese at medium speed until it is soft for about 4 minutes. With the mixer running, add the sugar and salt, and continue to beat another 4 minutes or so, until the cream cheese is light. Beat in the vanilla extract. Add the eggs one by one, beating for a full minute after each addition to yield a well-aerated batter. Reduce the mixer speed to low, and stir in the heavy cream or sour cream.
Put the foil-wrapped springform pan in the roaster pan, and pour in a few cups of the hot water in the pan around the springform pan (I do half before putting the cheesecake mixture, to reduce my chances of getting water in the cheesecake and to get everything ready.)
Give the batter a few stirs with a rubber spatula, just to make sure that nothing has been left unmixed at the bottom of the bowl, and scrape the batter into the springform pan. The batter should fill only half of the pan. Put the roasting pan in the oven and pour the rest of the boiling water into the roaster to come halfway up the sides of the springform pan.
Bake the cheesecake for 1 hour and 15-30 minutes, at which point the top will be browned (and perhaps cracked) and may have risen just a little above the rim of the pan. Turn off the oven’s heat, and prop the oven door open with a wooden spoon. Allow the cheesecake to luxuriate in its water bath for another hour.
After 1 hour, carefully pull the setup out of the oven, lift the springform pan out of the roaster—be careful, there may be some hot water in the aluminum foil—remove the foil. Let the cheesecake come to room temperature on a cooling rack.
When the cake is cool, cover the top lightly and chill the cake for at least 4 hours or overnight. Make the mousse once the cheesecake has cooled.