Chocolate & pear cake

INGREDIENTS

• 250g pack butter , melted, plus a little extra for the tin
• 250g caster sugar
• 200g self-raising flour
• 50g wholemeal flour
• 100g ground almonds
• 1 tsp baking powder
• 2 tsp mixed spice
• 1 tsp ground cinnamon
• good grating nutmeg
• 50g whole hazelnuts , finely chopped
• 50g whole almonds with skins on, finely chopped
• 50g pistachios , finely chopped
• 50g macadamia nuts , finely chopped
• 100g dark chocolate , finely chopped, or dark chocolate chips
• 3 large eggs , beaten
• 1 tsp almond extract
• 2 pears , peeled, cored and diced
• 300ml pot soured cream
• 100g dark chocolate , broken into chunks
• 100g milk chocolate , broken into chunks