1Preheat the oven to 150°C fan and line a 4 cm deep 15 x 25 cm baking tray.
2Break up the dark chocolate into a heatproof bowl. Add the butter and set the bowl over a pan of simmering water, making sure it doesn’t touch the water. Stir to combine then remove from the heat and leave to cool slightly.
3In your KitchenAid Artisan® Mini Mixer, whisk the eggs with the sugar until combined but not yet pale or fluffy.
4Pour the chocolate mixture over the eggs and sugar and stir to incorporate. Stir in the carob spread or Nutella. Fold through the flour with a pinch of salt.
5Scrape the batter into the tray and bake for 15 minutes; the top should look all flaky and cracked and have turned lighter brown, the edges should be wrinkly and the brownie shouldn’t be wobbly in the tray. Take it out as soon as it looks like this, as it will keep cooking in the tray as
6Leave to cool in the tin then cut into squares.