Preheat oven to 350 degrees. Coat an 8-inch square baking pan with cooking spray; set aside. Cut chocolate or carob into 1-inch pieces and place in heatproof bowl. Set over low heat in small skillet containing 1/2 inch simmering water. (I microwave) Stir occasionally just until melted. Remove from heat; set aside. In mixer bowl combine all ingredients except flour; beat to blend thoroughly. Mix in flour. Spread batter in prepared pan. Bake about 30 minutes until springy to the touch.