Use any nut you have on hand - pistachios, macadamias, almonds... they will all add flavour and protein to a very snackable biscuit. 

Makes 12-16 

120 g flour (I used wholemeal)

1/2 tsp baking powder

3 tsp cocoa powder

75 g sugar (I used coconut, finely ground)

25 g butter, chilled and cut into cubes

1 egg

1 Tbsp vegetable oil

40 g nuts

50 g dark chocolate, chopped

Preheat oven to 160C. Line a baking tray with baking paper.

Sift flour, baking powder and cocoa into a bowl, then stir in the sugar.

Rub in the butter using your fingertips until the mixture looks like sand.

Mix the egg and oil together then add to the flour mixture. Mix in the nuts and chocolate.

Transfer dough to a floured surface. Divide in half and roll each piece into a flattened log about 25 cm long and 5 cm wide.

Bake for 20 minutes. Remove from the oven and turn down temperature to 150C.

Use a serrated knife to cut each log into 6-8 evenly sized pieces and place them flat side down onto the baking sheet.

Bake for a further 10 minutes to dry out.

Remove from the oven and let cool on the tray for a couple of hours to harden.