Gingerbread Slice

Ingredients

• 1½ cups plain flour
• ½ cup self-raising flour
• 1 tsp bicarbonate of soda
• 2 tbsp ground ginger
• 3 tsp mixed spice
• ½ cup firmly packed brown sugar
• 1 cup golden syrup
• 1 cup milk
• ½ cup light olive oil
• 2 eggs
• 125g glacé ginger, finely chopped
• icing sugar, to serve