Place the butter, sugar, syrup and cocoa into a large pan then melt over a low heat, stirring occasionally.
Once melted and mixed together, remove from the heat then add the crushed biscuit and dried fruits.
Stir well then press into the tin, place a piece of parchment paper over the top then press and level out using your hand.
Melt the chocolate together either in your microwave or a bain-marie method, stir in the oil then pour over the top of the mix. Decorate with mini eggs.
Leave to set at room temperature then cut into pieces using a sharp knife.