1/2 cup (1 stick) butter, cut into 1-inch pieces
3/4 cup all-purpose flour
1 tablespoon cocoa powder
1/2 teaspoon salt
5 ounces bittersweet chocolate, coarsely chopped
3/4 cup granulated sugar
1/4 cup light-brown sugar
3 large eggs, room temperature
1 teaspoon pure vanilla extract
Spray 9 x 13 pan with Pam. Preheat oven to 375º.
Sift together flour, salt, and cocoa powder; set aside.
Gently melt chocolate and butter in microwave. Mix both sugars into chocolate mixture. Cool to room temperature.
Add eggs to chocolate mixture and whisk until just combined. Add vanilla and stir just to combine. Add flour mixture over chocolate mixture and gently fold flour mixture into chocolate mixture till just combined.
Make chocolate chip cookie dough. Use recipe on 12 oz bag of Nestle's Semi Sweet Morsels. Spoon onto top of brownie batter. Spread carefully to cover batter.
Bake 30 minutes. Cool to serve.