Pre heat oven to 325 degrees. Butter and flour with cocoa powder an 8 x 8 x 1 baking pan. Set aside.

Sift together the flour, cocoa powder and salt and stir to combine well. Cream together the eggs , extra yolk and sugar, add in the butter and vanilla. Add in the flour mixture. Do not over-mix.

Gently stir in the nuts and chips. Spread batter into the baking pan.

Bake for 30-40 minutes or until the brownies begin to firm up- A toothpick will have a few crumbs on it from the center. Let brownies cool about 30 minutes before slicing.