Make the brownie layer by whisking melted butter and chocolate together with sugar, eggs, espresso powder and salt untilwell combined.Fold in cooca powder and flour until smooth and well combined.
Pour the prepared cheesecake layer on top of the barely set brownie layer. Carefully and evenly spread the cheesecake layer across the brownie layer. Drizzle and swirl the cooled blackberry syrup.
Bake in a 325 F (165C) oven for 45-55 minutes or until the edges are turning golden brown and are slightly pulled from the edges of the pan. The center will still giggle slightly. Cool brownies for 1 hour. Move to the fridge to chill another hour.