Step 1

Line a 13x9-inch baking pan with foil, extending foil over edges of pan. Coat foil with nonstick cooking spray.

Step 2

In a 4- to 6-quart pot combine the first four ingredients (through cocoa powder). Cook and stir over medium heat until melted and nearly smooth. Remove from heat. Stir in the remaining ingredients.

Step 3

Spoon mixture into prepared baking pan; press firmly. Cover with waxed paper, set another pan inside, and weigh mixture down with cans of food. Chill 1 to 2 hours or until firm enough to cut. Remove cans and pan. Using foil, lift uncut bars from pan. Cut into bars.