Banana berry yoghurt muffins

Name: Banana berry yoghurt muffins
Prep time: 15 min
Cook time: 20 min
Total time: 35 min
Cuisine: American
Ingredients: 300.00 gm wholemeal self-raising flour; 75.00 gm self-raising flour; 2.50 gm ground cinnamon; 90.00 gm brown sugar; 260.00 gm banana, mashed; 4.40 gm vanilla extract; 1 egg, lightly beaten; 437.50 ml 98per cent fat-free blueberry yoghurt; 56.88 gm extra-light olive oil; 125.00 ml frozen or fresh blueberries