Red velvet cake recipe

SERVES 10 For the cake 3 ounces (or 85g) dark chocolate, chopped 2 cups (or 400g) granulated sugar 4 large eggs 1 ½ cups (or 450ml) vegetable oil 1 ½ teaspoons vanilla extract 2 cups (or 220g) plain flour 2 ¼ teaspoons bicarbonate of soda ¼ teaspoon salt 1 ½ pounds (or 680g) cooked beetroot in natural juices …