Sieve flour in a big bowl.
Wash and wipe the blueberries and dust(sprinkle) them with 1 tbsp of flour.
In a separate bowl add yogurt, castor sugar and mix well.
Now add baking soda and baking powder in the yogurt and mix.
Let the yogurt mixture rest for 3-4 minutes or till it froth.
Now add oil ,vanilla essence and lemon zest in the yogurt mixture and mix gently .
Now add the sieved flour in the yogurt mix .(keep adding 1 tbsp flour at a time and keep mixing)
Now add the blue berries in the flour mix and stir gently.
Fill the prepared mixture in muffin cups till 3/4 level(don’t fill it till the top ,as it need some space to rise while baking)
Bake in a preheated oven at 170 c for 35 minutes or till a tooth pick inserted come out clean.
Let it rest for 5 minutes in the oven.
Remove from the muffin cups and serve.