A super easy slice to rustle up in less than 30 minutes.

1 c flour of choice (I used spelt)
1 c cornflakes
1 c desiccated coconut
2 tbsp cocoa
3/4 c sugar of choice (brown or coconut are good)
150g butter or non-dairy spread, melted

1 c icing sugar
2 tbsp cocoa 
2-3 tbsp milk of choice

Preheat oven to 180C. Line a brownie tin with baking paper, leaving overhang on the sides.
Combine all the ingredients in a bowl. Press evenly into tin and bake for about 25 min until cooked through and you can see it's browned on the edges.
Remove and place on a wire rack to cool in the tin.
Mix all the icing ingredients together in a small bowl until smooth. You can ice the slice while still warm then sprinkle hundreds and thousands on top.
You could make this slice with wheetbix or activated buckwheat to provide the crunch.