Spray a 9 x 13 pan with non-stick baking spray or line the pan with non-stick foil. Preheat the oven to 350º.
Stir together the butter, sugar, eggs, and vanilla.
Add flour, cocoa, salt, and mix until combined. Spread in prepared pan.
To make the cookie dough layer, beat butter and sugars.
Add eggs and vanilla and mix until combined.
Add dry ingredients and using a wooden spoon, mix until combined. Fold in chips.
Flatten pieces of dough in your hands and lay across the brownie layer to cover.
Sprinkle on a few more chips. Bake 30-35 mins.
Cool on a wire rack before cutting.
