270 g of small pieces of biscuits (Digestive)
350 g dark chocolate (70% cocoa)
300 g condensed milk
165 g unsalted Butter
Put the pieces of biscuit in a large bowl. Melt the chocolate and butter over a pot of simmering water (au bain marie) and remove from the heat. Stir in the condensed milk. Pour the melted chocolate over the crushed biscuits and stir until all the pieces are well covered with chocolate.
Line a loaf cake tin with baking parchment paper (make sure all 4 sides are lined). Fill the tin with the biscuit mixture and press down hard using the back of a spoon. Scrape chocolate from the sides of your bowl and pour this over the biscuit cake. Spread evenly.
The cake is now ready to be chilled. Cover with tin foil and refrigerate overnight.
When set, cut into slices and enjoy!