Spray a 9 X 13-inch ... saucepan. Heat until boiling. Boil 30 seconds. Remove from heat. Add chocolate pieces; stir until melted. Spread over brownies.
Heat oven to 350°F. Grease ... blended. Stir in walnuts, if desired. Spread in ... or just until brownies begin to pull away from ... until smooth and spreadable.
Preheat oven to 350 degrees. Prepare brownie mix as package directs. Stir in walnuts. Spread onto well-greased 9x13 ... cutting. Store in refrigerator.