Banana Bread

Name: Banana Bread
Prep time: 20 min
Cook time: 55 min
Total time: 1 h 15 min
Yield: Makes 1 21 x 9 cm (8¼ x 3½ inch) loaf
Cuisine: United States
Ingredients: 1½ teaspoons baking powder; 50 g (1¾ oz) buckwheat flour; 70 ml (2¼ fl oz) sunflower oil; 165 g (5¾ oz) plain (all-purpose) flour; 60 g (2¼ oz) light brown sugar; 1 teaspoon ground cinnamon; 175 g (6 oz) sour cream (30% dairy fat); 2 eggs; 165 g (5¾ oz) banana, finely diced or mashed with a fork; 110 g (3¾ oz/¾ cup) dark chocolate, chopped into small pieces; 1 teaspoon natural vanilla extract