Melt the chocolate (in pieces) and the condensed milk together in the slow cooker, without the lid on. Stir occasionally. As soon as it is melted together and smooth, take the pot out of the slow cooker. This takes approx 30-40 minutes in my slow cooker.
Tip in the icing sugar and beat well until it is fully mixed in.
Stir in the chopped eggs (I used half of the mini and golden eggs which I had already cut in half).
Pour the mixture into a small, shallow baking tray lined with baking paper. I poured mine into one side of a thin tray. Smooth over the top.
Press the remaining eggs plus the halved Creme eggs into the top of the fudge.