Chocolate Brownies with Orange Cream Cheese Frosting

Preparation

1. Step 1

   Set oven rack in lower middle position; preheat to 325°. Spray a 13x9x1-inch disposable aluminum baking pan with nonstick spray. Press 18x12-inch sheet aluminum foil over bottom and up long sides of pan, leaving overhang on each long side. Spray foil with nonstick spray. Whisk flour, baking powder, and salt in a small bowl. Stir both chocolates and 10 tablespoons butter in a medium saucepan over medium-low heat until melted and smooth; remove from heat. Whisk sugar and vanilla, then eggs into chocolate mixture. Whisk until glossy and smooth, about 1 minute. Add dry ingredients and whisk until just blended.

   Step 2

   Pour batter into prepared pan. Bake until tester inserted into center comes out with some moist crumbs attached, 20–25 minutes. Cool completely in pan on a wire rack.

   Step 3

   Using an electric mixer, beat cream cheese and next 3 ingredients in a medium bowl until smooth. Spread cream cheese frosting over brownies. Sprinkle nuts or coconut over. Using foil overhang for handles, remove brownies from pan. Cut into 18 squares; serve cold or at room temperature.

   Step 4

   Do Ahead: Chocolate brownies can be made 1 day ahead. Cover and chill.