A very easy recipe from Sarah Wilson's I Quit Sugar For Life (Pan Macmillan Australia, 2014). Only the bought chocolate has sugar in it.

1 large or 1 1/2 small courgettes
1 c almond (or any nut) butter
1 egg
1/2 tsp vanilla powder or essence
1/4 c rice syrup
1 tsp cinnamon
1/2 tsp nutmeg
1 tsp bicarbonate of soda
100g dark (85%) chocolate, roughly chopped

Preheat the oven to 180C. Grease and line a 20cm square brownie tin.
Grate the courgette into a large bowl and then add the rest of the ingredients and mix thoroughly. Pour into brownie tin and bake for about 30 min or until a skewer comes out clean. Cool in the tin, then cut into squares.