Mini Chocolate Marble Cheesecakes

INSTRUCTIONS

1. Mix the cookie crumbs with the butter. Scoop out about 2 tablespoons of the crumb mixture into each of four (1-cup) ramekins or custard cups and press it down to make a layer a scant 1/4 inch thick. You may not need all the crumbs, but you can reserve them and sprinkle over the top of the cheesecakes as garnish.
2. To make the filling, beat the cream cheese, sour cream, and vanilla with a hand mixer in a small bowl until smooth. Add the sugar gradually, continuing to beat until the mixture is smooth again.
3. Beat in the egg until fully incorporated. Spoon out 2 tablespoons of the batter into a small bowl, then mix in the melted chocolate into the larger amount of batter.
4. Divide the chocolate cheesecake batter among the ramekins. Spoon the reserved vanilla batter over the chocolate mixture and swirl a skewer or small knife through it to create a marble pattern.
5. Add 1 cup of water to the inner pot. Place a trivet in the pot and then place the ramekins on top. If they won’t all fit in one layer, it’s fine to stack them. Drape a piece of foil over the ramekins to keep condensation off the top of the cheesecakes. Lock the lid in place.
6. Select Pressure Cook or Manual, and adjust the pressure to High and the time to 6 minutes. After cooking, let the pressure release naturally for 8 minutes, then quick release any remaining pressure.
7. Unlock the lid. Use tongs to remove the ramekins. Let cool for 20 minutes or so, then refrigerate to chill thoroughly, about 3 to 4 hours