Step-by-Step Instructions

Step 1: Prepare the Chocolate Crust

1. Preheat your oven to 325°F (163°C). Grease a 9-inch springform pan and line the bottom with parchment paper.
2. In a bowl, mix the chocolate cookie crumbs, melted butter, and sugar until the texture resembles wet sand.
3. Press the mixture firmly into the bottom of the pan, creating an even layer.
4. Bake for 10 minutes, then set aside to cool.

Step 2: Make the Strawberry Swirl Sauce

1. In a small saucepan over medium heat, combine strawberries, sugar, and lemon juice.
2. Cook for 5 minutes, stirring occasionally, until the strawberries break down and release their juices.
3. Stir in the cornstarch mixture and cook for another 1-2 minutes until the sauce thickens.
4. Blend until smooth, then let it cool to room temperature.

Step 3: Prepare the Chocolate Cheesecake Filling

1. In a large mixing bowl, beat the cream cheese and sugar until smooth and creamy.
2. Add the eggs one at a time, beating just until incorporated after each addition.
3. Mix in the vanilla extract, sour cream, and heavy cream, scraping down the sides of the bowl as needed.
4. Pour in the melted chocolate and mix until fully combined.

Step 4: Assemble the Cheesecake

1. Pour the chocolate cheesecake batter over the cooled crust.
2. Drop spoonfuls of the strawberry swirl sauce onto the surface.
3. Use a knife or toothpick to gently swirl the strawberry sauce into the chocolate batter, creating a marbled effect.

Step 5: Bake the Cheesecake

1. Wrap the bottom of the springform pan in two layers of aluminum foil to prevent water from seeping in.
2. Place the pan in a larger baking dish and pour in hot water, creating a water bath.
3. Bake for 50-60 minutes, or until the center is set but slightly jiggly.
4. Turn off the oven, crack the door open, and let the cheesecake cool inside for 1 hour.

Step 6: Chill and Serve

1. Transfer the cheesecake to the refrigerator and chill for at least 4 hours, preferably overnight.
2. Before serving, remove from the springform pan and slice with a warm knife for clean cuts.