
For the brownie bottom:
 8 oz. (about 1 cup) semi-sweet chocolate - either bars or chocolate chips
 2 sticks butter
 1 2/3 cups all-purpose flour
 ½ teaspoon baking powder
 ½ teaspoon kosher salt
 4 large eggs plus 2 large egg yolks
 2 cups sugar
 1 tablespoon pure vanilla
 For the cheesecake layer:
 2 8-ounce packages cream cheese, at room temperature
 1 ½ cups sugar
 ¼ teaspoon kosher salt
 6 large eggs
 1 ½ teaspoons pure vanilla extract
 2 cups (one 12-ounce package) semisweet chocolate chips
 Before you start:
 Position a rack in the center of your oven. Preheat the oven to 325 degrees. Lightly butter a 9×13-inch pan. Line the pan with parchment paper or aluminum foil.
 To make the brownies:
 1. In the top of a double boiler over simmering, not boiling water, melt the chocolate and the butter, stirring to combine. Set aside to cool to warm.
 2.    In a medium bowl, whisk together the flour, baking powder, and salt.
 3.    In a large bowl, whisk together the eggs, egg yolks, sugar, and vanilla until smooth.
 4. Pour the chocolate mixture into the egg mixture and combine with a whisk. Add the flour mixture to the chocolate/egg mixture and stir until just combined. Pour the brownie better into the prepared pan, and spread evenly.
 To make the cheesecake layer:
 In the bowl of an electric mixer fitted with the paddle attachment, cream together the cream cheese, sugar, and the salt until light and fluffy, about 5 minutes. Add the eggs, 2 at a time, and mix well after each addition. Scrape down the sides of the bowl. Stir in the vanilla.
 To complete the brownies:
 1.    Pour the cheesecake mixture over the brownie layer.  Sprinkle the chocolate chops evenly over the cheesecake layer.
 2. Bake for about 1 hour, or until lightly golden. You don't want to over-cook the brownies because they can become dry on the bottom. Remove to a wire rack to cool. Cool completely before slicing and store in an airtight container in the refrigerator. May be served cold or at room temperature.
 *Adapted from
 Dinner & Dessert