Preheat oven 350.
Line 9x9 pan with nonstick foil.
Melt butter and 3 ounces chocolate in microwave until smooth.
Beat sugar and eggs and vanilla.
Add the cooled chocolate/butter mix.
Add flour.
Pour in pan and bake 18 mins.
Cool.
Melt the 4 ounces chocolate and spread over top of brownies. Chill 15 mins.
Spread Nutella over the chocolate and chill 15 mins.
Drizzle top with the melted white chocolate chips.
Chill 5 minutes and cut into bars.