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Chocolate Swirl Cheesecake

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Ingredients
  

For the crust:

  • 1 1/2 cups (150 g) graham cracker crumbs (or digestive biscuits)
  • 1/4 cup (50 g) granulated sugar
  • 6 tablespoons (85 g) unsalted butter, melted
  • Pinch of salt

For the cheesecake filling:

  • 24 oz (680 g) cream cheese, softened to room temperature
  • 3/4 cup (150 g) granulated sugar
  • 1/2 cup (120 ml) sour cream, room temperature
  • 1/2 cup (120 ml) heavy cream, room temperature
  • 3 large eggs, room temperature
  • 2 teaspoons vanilla extract
  • 1/4 teaspoon fine salt
  • 1 tablespoon lemon juice (optional, for brightness)

For the chocolate swirl:

  • 4 oz (115 g) semisweet or dark chocolate, chopped
  • 1/4 cup (60 ml) heavy cream
  • 1 tablespoon unsalted butter
  • 1 teaspoon vanilla extract (optional)

To finish (optional):

  • Fresh berries, shaved chocolate, or a dusting of cocoa powder

Equipment:

  • 9-inch (23 cm) springform pan
  • Heavy-duty aluminum foil (for water bath)
  • Large roasting pan (for water bath)
  • Hand mixer or stand mixer
  • Rubber spatula and toothpick or skewer (for swirling)

Instructions
 

  • Prep the pan and oven. Heat the oven to 325°F (165°C). Wrap the outside of your springform pan with two layers of heavy-duty foil to keep water out. Lightly grease the inside or line the bottom with parchment.
  • Make the crust. Stir crumbs, sugar, melted butter, and salt until the mixture feels like damp sand. Press firmly into the bottom of the pan, going slightly up the sides. Bake for 8–10 minutes, then set aside to cool. Keep the oven on.
  • Make the chocolate swirl. In a small saucepan or microwave-safe bowl, heat the cream until steaming. Add chopped chocolate and butter. Let sit 1–2 minutes, then stir until smooth and glossy. Stir in vanilla if using. Cool to lukewarm—still fluid but not hot.
  • Beat the cream cheese and sugar. In a large bowl, beat cream cheese on medium speed until completely smooth, 2–3 minutes. Add sugar and beat another minute. Scrape the bowl and beater to avoid lumps.
  • Add the dairy and flavorings. Mix in sour cream, heavy cream, vanilla, salt, and lemon juice (if using) on low speed until combined. Keep the mixer on low to avoid whipping in too much air.
  • Add the eggs. Beat in eggs one at a time on low, mixing just until blended. Do not overmix. The batter should be silky and pourable.
  • Assemble in the pan. Pour about two-thirds of the cheesecake batter over the crust. Drizzle half of the melted chocolate over the surface. Use a skewer to gently swirl, making a few figure-eights without overmixing.
  • Add remaining batter and swirl again. Pour the rest of the batter over the swirled layer. Drizzle the remaining chocolate on top. Swirl lightly again for a marbled pattern. Keep some clean areas of batter to accent the contrast.
  • Set up the water bath. Place the foil-wrapped pan in a large roasting pan. Pour hot water into the roasting pan to reach halfway up the sides of the springform. This helps prevent cracks and ensures an even bake.
  • Bake gently. Bake at 325°F (165°C) for 55–70 minutes. The edges should look set while the center still has a slight jiggle, like set Jell-O. If the top browns too fast, tent loosely with foil.
  • Cool slowly. Turn off the oven and crack the door. Let the cheesecake rest inside for 45–60 minutes. Then remove from the water bath, unwrap the foil, and cool on a rack until room temperature.
  • Chill to set. Cover and refrigerate at least 6 hours, preferably overnight. This step is crucial for texture and clean slices.
  • Release and serve. Run a thin knife around the edge before unclipping the springform. Slice with a hot, clean knife, wiping between cuts. Garnish if you like and serve chilled.