Unicorn Head Cake

Sponges

• 375 g unsalted butter, soft, plus extra for greasing
• 375 g caster sugar
• 6 large eggs
• 375 g self-raising flour
• 60 g milk
• 1 tsp baking powder
• 2 tsp natural vanilla extract
• yellow food colouring gel

Buttercream Icing

• 450 g unsalted butter, soft
• 900 g icing sugar
• 1 tsp natural vanilla extract
• 45 g milk
• yellow food colouring gel

Decoration

• 600 g fondant icing, white
• 200 g fondant icing
• edible gold glitter spray
• water, for brushing
• coloured sugar sprinkles, rainbow mixture