Cardamom orange mousse cakes

Ingredients

• Chocolate orange mousse
• 300 millilitre thickened cream
• 150 gram dark eating chocolate, chopped coarsely
• 1 teaspoon finely grated orange rind
• 1/4 teaspoon cardamon
• Chocolate layer
• 25 gram unsalted butter, melted, extra
• 50 gram dark eating chocolate, melted
• Biscuit layer
• 25 gram unsalted butter, melted
• 125 gram butternut snap biscuits
• Orange syrup
• 2/3 cup (160ml) orange juice
• (55g) caster sugar
• 2 tablespoon finely shredded orange rind