Hidden carrot cake

Ingredients

• 125g soft butter, plus extra to grease
• 125g caster sugar
• 2 medium eggs, beaten
• 125g self-raising flour
• zest of ½ orange and 1 tbsp juice
• ½ tsp orange extract
• 2 tubes Dr Oetker orange gel food colour (or use a concentrated colour paste)
• 125g plain flour
• 1 tbsp cornflour
• 75g cocoa powder
• 1 tsp bicarbonate of soda
• 200g caster sugar
• 1 tsp orange extract
• 100g buttermilk or natural yogurt
• 1 medium egg
• zest of ½ orange, plus 100ml orange juice (about 2 oranges)
• dill or parsley sprigs
• 100g double cream
• 1 tbsp golden syrup
• 100g cook’s dark chocolate (70% cocoa solids), roughly chopped
• 4 chocolate creme Oreos
• 450g loaf tin
• 900g loaf tin