Triple Chocolate-Nut Brownies - cooking recipe

Ingredients

nonstick cooking spray
1 (21.5 or 23.7 oz.) pkg. fudge brownie mix
1 (3 oz.) bar milk chocolate, chopped coarsely
1/2 c. semi-sweet chocolate chips
1 (1 oz.) sq. unsweetened chocolate, chopped coarsely
1 1/2 c. mixed nuts from 12 oz. can, chopped coarsely
1/4 tsp. ground cinnamon

Preparation

Heat oven to 350\u00b0.
Line bottom and sides of a 9-inch square baking pan with foil, leaving a 2-inch overhang.
Spray foil with nonstick cooking spray.