Easy, soft and chewy chocolate cookies flavoured with fresh orange zest.
Preheat your oven to 180°C/350°F (or 160°C/325°F for fan or convection ovens).
Line an 8x10-inch tin with baking paper.
Mix the ground flax seeds with 1 tablespoon cold water and set aside for 5 minutes to let it thicken.
In a large bowl, mix together the margarine, caster sugar, brown sugar and vanilla extract. Stir in the flax seed mixture.
Add the flour and cocoa powder and mix until it starts to stick together. Then use your hands to press it together into a ball of dough.
Add the chocolate chips and orange zest and gently knead it into the dough.
Press the dough into your lined tin, making sure it goes all the way to the edges. Try to get it as even as possible.
Bake for 25 minutes. Leave in the tin to cool for around 30 minutes then transfer to the fridge for 2 hours to set.
After the 2 hours, remove the cookie slab from the tin. Drizzle over the melted chocolate and sprinkle over the extra orange zest if using.
Once the chocolate drizzle has set, cut the slab into 12 square slices and enjoy.