Place the walnuts and pecans in a food processor, and process until finely ground.
Add the cocoa powder and sea salt and pulse to combine. Transfer to a bowl and set aside.
Add the dates to the food processor and process until small bits remain. Remove and set aside.
Add nut and cocoa mixture back into food processor. Whilst processing, drop spoonfuls of the date mixture down the food processor spout and process until a dough consistency is achieved.
Add the brownie mixture to a 20x20cm brownie pan lined with baking paper. Use a spoon to press the mixture down evenly and all the way into the corners.
Top make the coconut topping, blend the coconut oil, rice malt syrup, dessicated coconut and coconut milk in a food processor.
Divide the mixture in half. Set half aside and keep the other half in the food processor. Add the Nature’s Way Flavoured Spirulina and food colouring (if using) to the half in the processor and mix until combined.
Tip the spirulina mixture on top of the brownie mixture in the prepared pan, and press the mixture down firmly with a clean spoon.
Tip the plain coconut mixture on top of the spirulina mixture, and press down again with a clean spoon.
Place in the fridge overnight, then slice and serve.