For the Buttery Biscuit Base (BBB) 200g Digestive Biscuit, Graham Cracker crumbs 60g melted butter A good squirt of Golden Syrup (or corn syrup) For the Brownie base 125g dark chocolate (70 cocoa) 125g butter, chopped 175g caster sugar 3 large freerange eggs 75g plain flour 1, 2 tsp vanilla extract For the M