In a small bowl, combine cocoa and oil until smooth.
In another bowl, beat eggs.
Add the sugar, vanilla, and cocoa mixture; mix well.
Stir in flour and salt just until moistened. Fold in walnuts.
Pour into greased 8" square baking pan;
sprinkle with chocolate chips.
Bake at 325F for 30 min. or until a toothpick comes out clean.
Cool on a wire rack. Yield: 16 brownies.