In a mixing bowl, combine crushed Oreos, melted butter, and espresso powder. Press this mixture into the bottom of a springform pan.
In another bowl, beat cream cheese and granulated sugar until smooth. Add coffee extract, eggs, heavy cream, cold brew coffee, lemon juice, salt, and flour. Mix until combined.
Pour the filling over the crust in the springform pan.
Bake in the preheated oven for 60 minutes. Let it cool completely.
For the ganache, heat heavy cream until simmering. Pour it over chopped chocolate and stir until smooth.
Spread the ganache over the cooled cheesecake and chill in the refrigerator.
Top with chocolate curls, sprinkles, or espresso beans before serving.
Notes
You can adjust sweetness with powdered sugar. The instant cheesecake pudding mix can add texture.