Preheat the oven to 275°F (135°C). Make sure your cream cheese is fully softened to room temperature before moving forward.
24 (680g) oz full fat cream cheese
Add the cream cheese to a large mixing bowl, and beat with hand beaters or a stand mixer until smooth and creamy, about 2-3 minutes. Scrape down the bowl.
Add the sugar and flour to the cream cheese, and whip it in until it's fully mixed in.
¾ (150g) cup granulated white sugar, 1 ½ (12g) tablespoons all-purpose flour
Now we will add the eggnog, sour cream, heavy cream, vanilla, rum or rum flavoring, nutmeg and cinnamon to the bowl. Mix the ingredients into the filling until smooth and creamy on medium speed.
¾ (180g) cup eggnog, ½ (120g) cup sour cream, ¼ (60g) cup heavy cream, 2 tsp pure vanilla extract, 2 (30g) tablespoons dark rum, 1½ teaspoons ground nutmeg, ½ teaspoon ground cinnamon
This next step it's important that your eggs are room temperature. Add 1 egg to the filling at a time, mixing ON LOW to incorporate the eggs into the filling. This helps keep the filling from getting air bubbles, and will make for a perfectly smooth cheesecake.
3 large eggs
Pour the cheesecake filling over the cooled crust, and place in your preheated oven. If you're worried about leaking, you can place a cookie sheet on a lower rack to catch and drips.
Bake the cheesecake for 1 hour at 275°F, then reduce to 250°F and bake an additional 15–20 minutes. The center should be slightly jiggly. Turn the oven off, and crack the door open (I use a spoon), and allow the cheesecake to slowly cool off and set for 1 hour. This step is key to a perfectly baked cheesecake without cracks for the temperature getting to hot then cold.
Once cheesecake has cooled down, remove from the oven and allow to cool at room temperature for at least six hours, ideally overnight in the refrigerator.