Mix together the pudding mix and milk in a mixing bowl and whisk well to combine. Let sit for 5 minutes to thicken.
Pour the pudding over the cake, making sure it gets down into the holes. Chill the cake in the fridge for several hours.
Place the chocolate frosting into the microwave for 15 second intervals until softened and able to be poured.
Pour the frosting over the cake, and spread it out into a smooth layer. Serve immediately or chill again before serving if desired.
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