Preheat oven to 180°C.
Place Dr. Oetker Nona Brownies Dark Chocolate, eggs and butter in a mixing bowl, mix until well combined.
Break 100g of Dr. Oetker Nona Cooking Chocolate into small pieces and fold into brownie batter.
Pour batter in a greased rectangle baking tray. Bake for 55 minutes, set aside to cool, then cut into squares.
Melt the remaining 100g cooking chocolate with microwave oven or “double boil”. Drizzle the chocolate over the brownies.
Tip: Brownies are ready when they pull away from side of the tray and when a skewer inserted in the centre comes out clean.