01 -
Add graham cracker crumbs and sugar in a big bowl, then pour in melted butter. Stir everything till it's all mixed and clumpy.
02 -
Push the crumb stuff into the bottom of a 23 x 33 cm pan and spread it around. Pop it in your freezer for a bit while you work on the filling.
03 -
Throw softened cream cheese, powdered sugar, a splash of vanilla, and sour cream in a bowl. Beat until it's nice and fluffy.
04 -
Whip cold heavy cream in a chilled bowl till it turns thick and forms stiff shapes when you lift the whisk.
05 -
Now lightly fold the whipped cream into your fluffy cheese blend. Be gentle so it stays airy and doesn't go flat.
06 -
Spread your cream cheese blend on the cold crust with a spatula, even it out, and stick it in the fridge at least four hours. If you're short on time, freezer for at least two.
07 -
Toss the blackberries, sugar, vanilla, cinnamon, water, and cornstarch in a saucepan. Stir it up over medium heat and keep moving it till it boils.
08 -
Turn the heat down. Let it bubble for about 8–10 minutes, stir now and then, till the berries turn mushy and thick like jam. Set aside to cool fully.
09 -
Spoon the cooled berry mixture over your cold cream cheese layer. Cut into squares and enjoy right away.