Pre heat the oven to 180 C & put the baking rack in
the middle. Use a long baking dish size 13x9 inch.
Line inside with aluminum foil with leaving edges of
the foil outside the dish to facilitate removing.
Brush foil with butter and set aside.
In a medium dish on a low temperature heat the
butter and the 2 kinds of sugar and keep stirring
until the butter melts and the mixture is soft. Add
the chocolate and continue stirring until it melts
completely.
Remove pot from heat and use a wooden spoon, add one
egg and stir till it disappears, continue the same
way with the remaining eggs, then add the vanilla.
Stir the flour with salt and add it to the mixture,
add the walnuts and mix. Pour into baking dish and
level mixture.
