Chocolate, orange & hazelnut cake - Good Food Middle East

Ingredients

• 175ml light-coloured olive oil, plus extra for greasing
• 140g blanched hazelnuts
• 100ml orange juice, plus zest 1 orange
• 140g self-raising flour
• ½ tsp baking powder
• 50g cocoa powder
• 3 large eggs
• 175g light brown muscovado sugar
• 300g golden caster sugar
• 1 large orange, cut into 3mm/1/8in slices
• 75ml orange juice
• 100g dairy-free dark chocolate
• 50g blanched hazelnuts, toasted
• 1 tsp edible gold powder (see tip)