Mix all the ingredients under “Cupcakes” to form a smooth batter, for 1-2 minutes.
Line a standard 12 hole muffin tray tin with muffin cases.
Divide the mixture between the muffin cases.
Bake in a preheated oven 180°C (360°F), Gas Mark 5 for 20-25 minutes until firm to the touch.
Allow to cool completely before decorating.
Melt the dark chocolate in a heatproof bowl over a pan of barely simmering water, stirring occasionally.
Allow to cool. Meanwhile in a large mixing bowl, beat the butter, icing sugar and vanilla extract together until smooth.
Add the melted chocolate and beat until thick and creamy.
Pipe each cake with the chocolate icing a place 2-3 mini eggs on each as per illustration.
Sprinkle on the grated white chocolate.