Preheat oven to 350.

In a large bowl sift together the flour, cocoa powder, salt, and baking powder; mix in the chocolate chips. Set aside.

In a separate bowl add in the eggs, butter, sugar, and vanilla and whisk just until combined.

Whisk the wet ingredients into the dry ingredients just until combined; do not overmix.

Spread the batter into a lightly greased 8-inch square pan and sprinkle the top with walnuts.

Bake for 30 to 35 minutes, or until a toothpick inserted into brownies comes out with a few crumbs.

Let cool.

Cut and Serve.