Simply the best gluten free brownie recipe – Easy and gluten free

Ingredients

• 220 g dark chocolate (for the most delicious result, use chocolate with 70% cocoa; it works very well with dark chocolate that has a lower cocoa content, but it is a bit too sweet for my taste)
• 100 g butter
• 150 g cornflour
• 1 small teaspoon gluten free baking powder
• a pinch of salt
• 4 eggs
• 350 g sugar
• 1 small teaspoon vanilla sugar
• 100 g pecans or walnuts (optional)