Preheat oven to 325 degrees F. Coat a 9-inch springform pan with nonstick spray; set aside.
Places 20 whole double stuffed Oreos in a food processor and pulse until fine crumbs form. Drizzle in a 1/4 cup unsalted melted butter and pulse again until combined.
Press cookie mixture into the bottom of the prepared pan.
Place 1 & 1/3 cups semisweet chocolate chips and 1/4 cup heavy cream in a microwave safe bowl; microwave for 45 seconds, stir, and microwave again in 15 second intervals until melted, if necessary. Stir until combined.
In a large bowl with a handheld or stand mixer, beat 3 (8 ounce) bricks softened cream cheese until smooth. Wipe down the sides of the bowl. Add in 1 cup sugar and beat until well blended. Add in 3 large eggs, one at a time, blending in between each one.
Add in the melted chocolate and blend well.
Blend in 1 cup sour cream, 1/4 cup Kahlua, 1/4 cup cooled espresso (or coffee), 2 teaspoons vanilla, and 1/4 teaspoon salt; beat until smooth.
Pour mixture on top of the Oreo crust.
Bake on middle oven rack for about 55 minutes, until set, but still soft in the center (do not overtake.) Turn off heat, prop door open, and let cheesecake rest in the oven for 25 minutes.
Transfer cheesecake to a wire rack, run a dull knife around the edge to loosen, then cool for 30 minutes. Remove pan rim and let cool completely. Then chill in the refrigerator for a full day (or overnight.)
Melt some chocolate and drizzle over the top.
Let set, slice, and serve!
Video
Notes
Skip the alcohol. If you don't cook with alcohol, you can simply replace the Kahlúa with more cooled coffee.