Drip Candle Cake with Funfetti Sponge

Sponge

• 375 g unsalted butter, soft, plus extra for greasing
• 375 g caster sugar
• 6 large eggs
• 375 g self-raising flour
• 1 tsp baking powder
• 2 tsp natural vanilla extract
• 60 g milk
• 150 g coloured sugar sprinkles, large (bake stable)

Icing

• 400 g unsalted butter, soft
• 800 g icing sugar
• 1 tsp natural vanilla extract
• 45 g milk
• orange food colouring gel
• 5 tsp water
• 200 g icing sugar, for royal icing

Decoration

• 10 g coloured sugar sprinkles
• 140 g fondant icing, white
• blue food colouring gel
• water, for brushing