Crush the Marie Biscuits finely
In a large bowl, combine your crushed biscuits, cake flour, desiccated coconut, and cocoa powder. Mix thoroughly to ensure even distribution.
Then add the melted butter, sweetened condensed milk, and vanilla extract to the dry mixture. Stir until the mixture is sticky, and a cohesive dough forms. Don't be shy about using your hands to mix the dough more evenly.
Next, press the mixture evenly into the pan, smoothing the surface with a spatula or the back of a spoon. Make sure that you have greased the pan with oil, butter or Spray n Cook. You can also use baking paper.
Melt the chocolate with butter in a microwave or double boiler, stirring consistently to ensure it doesn't burn. Just before all the chocolate is melted, add the cream. Pour the melted chocolate over the brownie base, spreading it evenly.
Pop the brownies in the fridge for about 2 hours, and then cut into squares and enjoy your new favourite quick chocolatey treat!