Fudgy espresso brownies recipe

Ingredients

• 50 g cocoa powder
• 175 g plain white flour or white spelt flour
• 1 tsp baking powder
• 0.2 tsp sea salt flakes
• 175 g golden caster sugar
• 125 ml light olive oil or sunflower oil
• 150 ml warm coffee or water
• 1 1/2 tbsp cider vinegar
• 100 g 70% dark chocolate chips or chopped dark chocolate
• 50 g pecan or walnut halves
• 1 tbsp icing sugar (confectioners' sugar), for dusting (optional)