PREHEAT oven to 350 F.
GREASE 12 inch pizza pan.
PREPARE brownie mix as package directs for fudgy brownies; STIR chopped peanuts into batter.
SPOON mixture into prepared pan and BAKE 15 minutes; COOL in pan.
For icing, SPREAD top with chocolate fudge topping to within 1/2 inch of edge; SPRINKLE with M&Ms.
In small saucepan over low heat, MELT white chocolate; DRIZZLE over top with spoon.
Per Serving (excluding unknown items): 139 Calories; 9g Fat (53.4% calories from fat); 3g Protein; 14g Carbohydrate; 1g Dietary Fiber; 2mg Cholesterol; 10mg Sodium. Exchanges: 0 Grain(Starch); 1/2 Lean Meat; 1 1/2 Fat; 1 Other Carbohydrates.