01 -
Toss graham cracker crumbs with sugar in a roomy bowl. Add your melted butter now and give it a good mix until everything’s damp and blended.
02 -
Push that crumb mix into the bottom of a 23 x 33 cm pan, making it even. Stick it in the freezer for a bit so it firms up while you tackle the next parts.
03 -
With a medium bowl, beat soft cream cheese, powdered sugar, vanilla, and sour cream all together until the mixture gets creamy and smooth.
04 -
In a bowl that’s cold, beat the heavy cream on fast until stiff peaks stand up on the beater.
05 -
Gently blend the whipped cream into your cream cheese mix. Try not to squish out any of the air so it stays light.
06 -
Spoon the creamy filling over your chilled crust and level it out. Pop it into the fridge for at least 4 hours, or freeze for a solid 2, until it’s good and firm.
07 -
Grab a medium saucepan. Combine blackberries, sugar, vanilla, cinnamon, water, plus the cornstarch. Mix it all up thoroughly and cook over medium, keep stirring until it starts to bubble.
08 -
Turn your stove down. Let everything bubble gently for about 8 to 10 minutes, stirring now and then, until the berries are pretty much broken down and the sauce turns thick. Take it off the heat and let it cool off fully.
09 -
After the filling’s set and your blackberry sauce has cooled, spread that fruit topping over the cream cheese layer. Cut into squares and enjoy!