Preheat the oven to 175ºC
Mix warm water with the flax meal to create a flax egg and set aside.
Line the baking tray with parchment paper, ensuring both the bottom of the tray and the sides are well covered.
In a bowl, add the flour, sugar, carob powder, vanilla extract, olive oil and flax egg. Mix to combine.
Add the sloe syrup and sloe berry pulp and mix well.
Transfer to a baking tray and spread the mix evenly, going right into the corners of the tray.
Bake in the oven for minutes 25 to 30 minutes.
Once cooked, leave to cool.
Once the brownie has cooled completely, turn over onto a chopping board and cut into half.
Soak both the sides is the sloe syrup.
Layer in the sloe pulp and stack the other half on top.
Dust with cocoa powder and cut into nine equal portions.