01 -
Heat your oven to 325°F (160°C). Line a 9-inch springform pan with parchment paper on the bottom. Mix crushed cookies and sugar in a food processor until sandy, then blend in melted butter. Press the mixture firmly into the pan, creating an even base and pushing some up the sides. Bake for 10 minutes, then set aside to cool but keep the oven on.
02 -
While the crust cools, gently toss blueberries with sugar, flour, and lemon juice in a bowl until no dry flour remains. The mixture will look glossy and slightly thickened. Set aside.
03 -
In a separate bowl, combine flour and brown sugar, then pour in melted butter. Use a fork to mix until you get a beautifully textured crumble with no dry spots. The mixture should form small clumps when pressed together.
04 -
Beat cream cheese on low speed for 1 minute until smooth. Add sugar and mix for another minute, scraping down the sides. In a small bowl, whisk sour cream and cornstarch until smooth, then add to the cream cheese mixture along with vanilla. Mix on low speed until just combined. Add eggs two at a time, mixing gently until incorporated.
05 -
Pour the silky cheesecake batter into the cooled crust. Gently scatter the blueberries on top, followed by an even layer of crumble. Place the springform pan in a larger cake pan, then set inside a roasting pan. Pour hot water into the outer pan to create a water bath. Bake for about 1 hour and 25 minutes until the edges are set but the center still has a slight wobble.
06 -
Turn off the oven, crack the door open, and let the cheesecake cool in the oven for 1 hour. Remove from the water bath and cool on a rack for another hour until room temperature. Refrigerate for at least 6 hours, preferably overnight, before serving.