Beetroot and chocolate cake

Ingredients: 
1 large beetroot, cooked and roughly chopped
200g plain flour
50g cocoa powder
1 tsp baking powder
250g caster sugar
3 eggs
2 tsp vanilla extract
200ml olive or sunflower oil
100g dark chocolate
Method: 

• Pre-heat oven to 190C/ gas 5
• Put beetroot in a food processor, blitz, then add a pinch of salt and the rest of the ingredients, except the oil and chocolate.
• When completely mixed, add the oil in a steady stream.
• Break the chocolate into small chunks and stir into the mix.
• Tip into a lined 900g loaf tin and cook for 1 hour

Original Source: 
BBC Good Food