Quick and easy:
125g melted butter
3/4 cup brown sugar
Melt 185 g dark chocolate ( a block minus two squares)
Add to mixture.
Pour in 1 cup plain flour.
Fills one lined lamington tin/slice tray.
Bake at 180 degrees for 20minutes. These brownies are better soft than hard and the chocolate is like lava inside.
This was from our local school's recipe book.