Place the digestive biscuits into a blender and pulse until small crumbs have formed
Melt the butter in the microwave until liquid
In a mixing bowl, mix together the melted butter, biscuit crumbs and cocoa powder until completely combined
Tip the biscuit base ingredients into the tart tin and press down evenly using the palm of your hand, covering the whole base and pressing the biscuit layer up the sides of the tin until fully covered
Place the base into the fridge whilst you create the filling
Using a Bain-Marie, melt the chocolate until it becomes liquid
Remove from the heat and pour the whole can of full fat coconut milk into the bowl
Whisk the chocolate and coconut milk mixture together until a thick and silky ganache forms, working quickly so that the chocolate doesn't set and create clumps
Remove the base from the fridge and pour the chocolate ganache filling into the centre
Use a spatula to even the top out if required and place back into the fridge for at least 2 hours to set
Serve with fresh berries and chocolate chips (optional)
Cut into 12 slices, tuck in and enjoy!