Prepare the crust: Preheat oven to 325°F (160°C). Crush biscuits into fine crumbs using a food processor or Ziploc bag. Mix with melted butter until evenly moistened. Press firmly into the bottom of a 9-inch (23 cm) springform pan. Bake for 7–8 minutes. Set aside.
Lower oven temperature: Reduce heat to 300°F (150°C).
Make the filling: In a large bowl, beat cream cheese and sugar until smooth. Add vanilla, sour cream, and heavy cream, mixing until combined. Beat in cornstarch. Add eggs one at a time, mixing gently after each addition, and avoid over-mixing.
Bake in a water bath: Wrap the pan in heavy aluminum foil to prevent leaks. Place inside a large roasting pan, pour in hot water until it reaches halfway up the sides of the springform pan. Bake 45–60 minutes, until edges are set and the center still jiggles slightly. Turn off the oven, leave the cheesecake inside for 1 hour.
Chill: Remove from oven, cool to room temperature for 1 hour, then refrigerate at least 4 hours (overnight is best).
Make the caramel pecan topping: In a large pan over low heat, melt butter, sugar, and salt until bubbly. Stir in heavy cream, cinnamon, and pecans. Cook until pecans are well coated. Remove from heat, stir in vanilla, and let cool for 5–10 minutes.
Assemble: Release chilled cheesecake from the pan, spoon pecan topping evenly over the surface, and serve.
Video
Notes
Water bath (bain-marie): Essential for an evenly baked, crack-free cheesecake. Ensure your foil wrap is tight to prevent water from seeping in.
Don’t over-beat: Incorporating too much air can cause cracks. Mix gently once eggs are added.
Cooling is key: Always let cheesecake cool gradually (in the oven, then at room temperature, then refrigerated) to avoid cracks and sinking.
Storage: Store cheesecake covered in the refrigerator for up to 4–5 days. Freeze slices (without pecan topping) for up to 2 months, wrapped tightly. Add topping after thawing.
Crust: Use digestive biscuits, vanilla wafers, or even chocolate cookies for variation.
Pecans: Swap with walnuts or hazelnuts.
Dairy: Greek yogurt can replace sour cream in a pinch.
Variations: Try adding a swirl of caramel sauce into the filling before baking, or drizzle extra salted caramel over the pecan topping.
Baking time: Every oven is different, start checking at 40 minutes. The edges should be set, center slightly wobbly. It will firm up as it cools.