Layered Mocha Cheesecake

Name: Layered Mocha Cheesecake
Cuisine: American
Ingredients: 1 1/2 cups (195 grams) all-purpose flour; 1/4 cup (20 grams) Dutch-process cocoa powder; 1/4 cup (20 grams) black cocoa powder (just use more Dutched cocoa powder if you don’t have it); 1 cup (200 grams) granulated sugar; 1/2 teaspoon fine sea or table salt; 1/2 teaspoon baking powder; 1/2 cup (115 grams) unsalted butter, cold is fine if using a food processor; 1 large egg; 1 teaspoon (5 ml) vanilla extract; 1 1/2 pounds (3 8-ounce packages) cream cheese, at room temperature; 4 large eggs; 1/4 cup (60 grams) sour cream; 4 ounces (115 grams) semi- or bittersweet chocolate, chopped, or chips (2/3 cup), (melted and cooled slightly; 2 teaspoons instant espresso powder; 1 teaspoon molasses; 3 ounces semi- or bittersweet chocolate, chopped, or chips (1/2 cup); 3 to 4 tablespoons (15 to 20 ml) heavy cream; 1 tablespoon (15 ml) corn syrup (optional, but makes it glossier); 1 tablespoon black cocoa powder; Gold dragees, if you wish