1. Preheat oven to 350 degrees.
2. Mix flour and salt together in large bowl.
3. Add cocoa, sugars, walnuts, and chocolate chips.
4. Stir melted butter, eggs and vanilla into brownie mix.
5. Spread mix into greased 9-inch square pan. Bake at 350 degrees for 35 minutes, then cool.
Makes about 12 servings.