For topping: melted chocolate for drizzling and heart sprinkles
Instructions
Line a 9×9 pan with parchment paper, leaving a little overhang on two sides so the bars are easy to lift out later.
Press the cookie dough evenly into the bottom of the pan. You’re just leveling it out, not packing it down.
Bake at 325°F for 12–14 minutes, until the top looks set and slightly puffed but the center is still soft. Remove from the oven and let it cool for about 5–10 minutes.
In a large bowl, beat the cream cheese and sugar until completely smooth, scraping down the bowl so there are no lumps. Add the eggs one at a time, mixing on low speed just until incorporated. Stir in the sour cream, vanilla, cornstarch, and salt. The batter should be smooth and pourable, not whipped.
Pour the cheesecake filling over the warm cookie base and gently smooth the top. Tap the pan lightly on the counter once or twice to release any air bubbles.
Return the pan to the oven and bake at 325°F for 35–40 minutes. The edges should be set while the center still has a slight jiggle.
Turn the oven off, crack the door open, and let the cheesecake sit inside for 30 minutes. Remove and cool completely at room temperature, then refrigerate for at least 4 hours, preferably overnight.
Lift the cheesecake out using the parchment. Slice with a sharp knife, wiping between cuts for clean bars. Drizzle with melted chocolate and finish with heart sprinkles.