In a small saucepan, MELT together cocoa, butter, and shortening; SET aside.
In a small mixing bowl, BLEND sugar, salt, milk, and vanilla.
ADD chocolate mixture; MIX well; let STAND, STIRRING occasionally until desired consistency.
SPREAD on brownies; SPRINKLE with chopped nuts, if desired.
Good topping for ZUCCHINI BROWNIES
Per Serving (excluding unknown items): 209 Calories; 9g Fat (37.0% calories from fat); 2g Protein; 33g Carbohydrate; 2g Dietary Fiber; 9mg Cholesterol; 34mg Sodium. Exchanges: 0 Grain(Starch); 0 Lean Meat; 0 Non-Fat Milk; 1 1/2 Fat; 2 Other Carbohydrates.