Monogrammed cupcakes

Ingredients

• 200g unsalted butter - softened
• ½ cup caster sugar
• 4 eggs
• 2½ cups plain flour
• 2 baking powder
• 1 cup milk
• 1 tbsp vanilla extract
• 50g unsalted butter - for icing
• 2 cups icing sugar - for icing, sifted
• 2 tbsp milk - for icing
• 700g ready-to-roll fondant icing - from cake decorating shops
• gel or paste colouring - blue, pink or yellow
• icing sugar - for dusting
• 1 cup white chocolate pieces - for initials