Salted Caramel Cheesecake Brownies

Name: Salted Caramel Cheesecake Brownies
Cuisine: American
Ingredients: 3 tablespoons (20g) cocoa powder; 3 tablespoons very hot water; 3/4 cup (150g) chopped dark chocolate; 8 tablespoons butter; 1/3 cup (70g) granulated sugar; 1/2 cup (105g) dark brown sugar; 2 eggs, room temperature; 1 teaspoon vanilla; 3/4 cup (100g) all-purpose flour; 2 teaspoon malt milk powder (optional); 3/4 teaspoon espresso powder; 1 teaspoon salt; 8oz cream cheese, softened to room temperature; 1/4 cup heavy whipping cream; 1/3 cup powdered sugar; 1 tablespoon salted caramel sauce; 1/2 cup of salted caramel sauce for topping (I prefer storebought for ease, but I use this recipe for homemade); flakey sea salt to top