Creating the Chocolate Strawberry Swirl Cheesecake is easier than you might think! Just follow these simple steps:

1. Preheat the Oven: Preheat your oven to 325°F (163°C). Prepare a 9-inch springform pan by greasing the sides and bottom.

2. Make the Crust: In a medium bowl, combine chocolate cookie crumbs, granulated sugar, and melted butter. Mix until well combined. Press the mixture firmly into the bottom of the prepared pan.

3. Bake the Crust: Place the crust in the preheated oven and bake for about 10 minutes. Remove from the oven and let it cool.

4. Prepare the Cheesecake Filling: In a large mixing bowl, beat the softened cream cheese until smooth. Gradually add the sugar and vanilla, mixing until combined.

5. Add Eggs: Add the eggs one at a time, mixing well after each addition. Be careful not to overmix.

6. Incorporate Sour Cream and Cocoa: Add the sour cream and unsweetened cocoa powder to the mixture. Blend until smooth and creamy.

7. Create the Strawberry Swirl: In a separate bowl, combine the pureed strawberries, sugar, and lemon juice. Stir until well combined.

8. Layer the Cheesecake: Pour half of the cheesecake filling over the cooled crust. Add half of the strawberry puree on top, then use a knife or skewer to swirl the two together gently. Repeat this process with the remaining cheesecake filling and strawberry puree.

9. Bake the Cheesecake: Bake in the preheated oven for 55-60 minutes, or until the edges are set but the center still has a slight jiggle.

10. Cool the Cheesecake: Turn off the oven and crack the oven door. Allow the cheesecake to cool for about an hour in the oven. Then, remove it and refrigerate for at least 4 hours or overnight for the best results.