You will need a 20x30cm brownie baking tin for this recipe. You will also need to ensure the sweet potato has been pre-steamed until soft and the dates have been soaked.
Preheat the oven to 180 degrees C.
Add all of the ingredients (excluding the chocolate chunks!) to the food processor and blitz until smooth. Now stir through the chocolate chunks.
Spoon the mixture in to the brownie tin and spread out until even.
Bake in the oven for 20-25mins. Check that it is cooked through by placing a skewer into the centre of the brownie and seeing that it comes out clean. If not, return to the oven for another few minutes and test again.
Remove from the oven and allow to cool for 10 minutes before slicing into 8 brownies. Remove each brownie from the tin and allow to cool completely on a cooling rack before eating.
Notes
I think these brownies taste better when they have had chance to sit in the fridge for a while to completely cool.