Preheat oven to 350F. Line a 9-inch x 9-inch baking pan with foil leaving a 2-inch overhang. Coat with non-stick cooking spray.
In microwave-safe bowl melt butter.
Stir in sugar then eggs, flour, cocoa powder, vanilla, chipotle chili pepper and salt. Stir until blended.
Reserve 1 cup bittersweet chocolate chips. Stir remaining bittersweet chocolate chips into brownie batter.
Transfer batter to prepared pan and bake 30 minutes or until toothpick inserted in center comes out with moist crumbs.
Cool 10 minutes in pan. Using foil overhang lift brownies and cool completely on wire rack.
Microwave heavy cream until hot. Pour over reserved 1 cup bittersweet chocolate chips. Let stand 5 minutes. Stir until smooth and spread over top of brownies.