- Preheat oven to 165°C. Line a 9x9-inch (23x23 cm) baking pan with parchment paper. 
- Make the crust: Combine graham cracker crumbs, sugar, and melted butter. Press firmly into the bottom of the pan. Bake for 10 minutes and let cool. 
- Prepare the cheesecake layer: Beat cream cheese and sugar until smooth. Add eggs one at a time, mixing after each. Add vanilla and sour cream. Pour over the crust and spread evenly. 
- Bake the cheesecake for 25–30 minutes until just set. Let it cool for 10 minutes. 
- Make the pecan pie topping: In a bowl, mix brown sugar, corn syrup, vanilla, salt, and eggs. Stir in chopped pecans. 
- Pour topping gently over the cooled cheesecake layer. Bake for another 20–25 minutes, or until topping is set. 
- Cool completely, then refrigerate for at least 2 hours before cutting into bars. 
- Slice and serve! Store leftovers in the fridge for up to 5 days.