Preheat oven to 190°C bake. Place 20 individual paper baking cups in cupcake pans.
Beat butter in an electric mixer until smooth. Add Chelsea Caster Sugar and cream together. Add eggs. Mix well, then add the vanilla, flour and milk. Beat until smooth.
Pour mixture into the prepared pans until they are about two-thirds full. Bake for 20 minutes or until golden. Leave for a few minutes, then remove onto a wire rack to cool completely.
Chocolate Icing/ Decoration
Cream butter until pale and fluffy. Gradually mix in Chelsea Icing Sugar and cocoa until fully combined. Pour in milk and beat for an additional 4 minutes. Icing should spread easily; if too thick, add a little more milk.
To decorate, spread or pipe chocolate icing thickly onto cooled cupcakes. Finish by placing mini Easter eggs on top.