Ruby's ‘Jamaican Me Crazy’ Ginger Cake recipe - The Great British Bake Off

Ingredients

• 375g unsalted butter, softened
• 330g dark brown soft sugar
• 125g black treacle
• 175g golden syrup
• 1 tsp vanilla bean paste
• 6 large free-range eggs
• 4 tbsp spiced rum
• 4 tbsp ground ginger
• 3 tbsp ground cinnamon
• 375g self-raising flour
• 4 ½ tbsp soured cream
• 6 pieces of stem ginger, drained and finely chopped, syrup reserved
• 50g unsalted butter
• 50g caster sugar
• 2 tbsp golden syrup
• 50g plain flour
• 1 tsp ground ginger
• 150ml double cream
• 40g unsalted butter
• 75g light muscovado sugar
• 750ml double cream
• 400g mascarpone
• 2 tsp vanilla bean paste
• 4 tsp Valencian orange extract
• finely grated zest of 4 large oranges
• 6 tbsp ginger syrup (from the jar of stem ginger)
• 2 tbsp spiced rum
• 25g caster sugar