This rich dessert involves a fudge brownie stuffed with a mini Cadbury creme egg, followed by two layers of whipped white chocolate ganache and topped with creamy milk chocolate. This bar does need to be set up overnight before you finish it with milk chocolate and cut it, so ensure that you have left yourself enough time. They are easiest to cut chilled just after you’ve allowed the milk chocolate layer to set, but they taste the best at room temperature, so allow them to lose their chill before serving.