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  http://www.snapabite.com/blog/brownies-chocolate-tnt/2012/11/04/

Brownies

Preparation time: 10 minutes
Cooking time: 45-60 minutes
Serves: 30-40 brownies

Ingredients

4 egg(s)
250 gr butter
60 gr flour
80 gr cocoa powder
320 gr sugar
50 gr vanilla sugar
200 gr chocolate
1 teaspoon(s) of baking powder

Preparation

Preheat your oven to 160°C/320°F.
Mix all dry ingredients (not the chocolate).
Mix the eggs with the melted butter.
Add the eggs and butter to the dry ingredients and stir until smooth.
Add the chocolate to the mixture.

Grease an oven tray (30x20 cm/12x8 inch) with some extra butter.
Sprinkle some extra cocoa powder over the butter and shake the tray to evenly coat it.
Pour the mixture in the tray.
Bake for 45 to 60 minutes.
Once ready, let it cool down before taking it out of the tray.


source:

slightly adapted from Bill's Food by Bill Granger.