Hazelnut brownies

Ferrero Rocher chocolates make an indulgent finishing touch to these fudgy chocolate brownie squares studded with chopped nuts Ingredients box of 16 Ferrero Rocher chocolates 250g pack salted butter, plus extra for greasing 250g golden caster sugar 225g light muscovado sugar 100g cocoa powder 4 large eggs 100g self-raising flour 85g ready-chopped hazelnuts 4 tbsp Frangelico…