Reduce the oven temperature to 325°F and position two racks—one in the middle and one on the lowest level. Start heating 3 cups of water in the microwave; you’ll need it when the cheesecake goes into the oven.
In a large mixing bowl or the bowl of a stand mixer fitted with a paddle attachment, beat the cream cheese, sugar, salt, and vanilla on medium-high until smooth, about 2 minutes, scraping 1-2 times. The mixture should be very smooth.
32 ounces cream cheese, 1 ¼ cup granulated sugar, ½ teaspoon salt, 1 teaspoon vanilla
Add in the eggs one at a time and mix on low, beating until each is well combined before adding the next one. Scrape the bowl occasionally.
3 large eggs
Add the heavy cream low until just combined. Gently fold in the chopped Oreos and stir until evenly distributed.
⅓ cup heavy cream, 15 oreos
Place your prepared pan on a rimmed cookie sheet, then pour the filling into the slightly cooled crust. Place the cookie sheet on the middle rack of the oven, then place a 9x13 baking pan on bottom rack and pour about 3 cups of hot water into it. Shut the oven door to trap the steam.
Bake at 325F for 55 minutes. Then turn the oven off and prop the oven door slightly (I used a wooden spoon) and allow to cool for 1 hour. Don't open the oven all the way or the heat will escape.
Remove the pan from oven and cool for another 3-4 hours at room temperature, then refrigerate uncovered overnight or until fully chilled.
Once it is fully chilled, release the clasp on the spring form pan and carefully remove the cheesecake. You can leave it on the base, or place it on a serving platter.