Preheat your oven to 325°F (160°C). This is a good time to get out all your [cream cheese] so it softens! Wrap the outside of your [9-inch Springform Pan] with [aluminum foil]. Crush the [Oreo cookies] in the [Food Processor] until fine. Add the [melted butter] and [1 tablespoon instant espresso powder]. Mix until it looks like wet sand.
Now for the fun part! Using your [Electric Mixer], beat the softened [cream cheese] and [granulated sugar] until the mixture is completely smooth and fluffy (about 3 minutes). This is where little Olivia loves to scrape down the sides, make sure every bit is incorporated!
Dissolve the [3 tablespoons instant espresso powder] in 1 tablespoon of hot water before adding it to the cream cheese mixture, this prevents grainy spots. Add the [sour cream], [heavy cream], [vanilla extract], and [salt]. Mix until everything is just combined and perfectly smooth.
Place the [springform pan] inside the [Roasting Pan]. Carefully add hot water to the roasting pan so it comes halfway up the sides of the cheesecake pan. Bake for 55 to 65 minutes until the edges are set but the center still jiggles slightly. The water bath is a little extra effort, but it guarantees a creamy, crack-free top, just like Grandma Viola taught me!
Remove the cheesecake from the oven and water bath, cool it completely to room temperature, then transfer it to the refrigerator to chill for at least 6 hours, or ideally, overnight. While it chills, whisk the [heavy whipping cream], [powdered sugar], and [1 teaspoon instant espresso powder] until stiff peaks form.