Arrange a heatproof bowl over a pan ofboiling water.
Place ½ cup of softened butter, cocoa powderand sugar in the bowl over boiling water and cook for about 6-8 minutes or untilmelted and smooth, stirring frequently.
Add in egg, beating continuously with a wirewhisk.
Cook for about 2-3 minutes, stirringcontinuously.
Remove the bowl of butter mixture from heatand stir in graham cracker crumbs, coconut, and almonds until well combined.
Place the mixture into an ungreased 8x8-inchbaking dish evenly and with the back of a spoon, press into the bottom.
In a medium bowl, add remaining softenedbutter, heavy cream, and custard powder and beat until fluffy and light.
Add in confectioners' sugar and beat untilsmooth.
In the baking dish, place the cream mixture overthe bottom layer and with a spoon, spread evenly.
Refrigerate until set completely.
Meanwhile, in a microwave-safe bowl, place chocolate squares and 2 teaspoons butter and microwaveon low setting for about 2-3 minutes or until melted completely, stirring afterevery 20 seconds.
Remove the bowl from microwave and stir untilsmooth.
Spread the chocolate mixture over chilledbars evenly and refrigerate until set completely.
Cut into 16 equal-sized squares and serve.