Mix flour with baking powder & baking soda. Add sugar & oil in a bowl.mix well.Add in lemon juice,zest,essence( if using) and mix up.Add chia seeds to it,mix.
Slowly add in flour and mix thoroughly .If difficult to mix add milk.
Transfer it to a muffin baking pan and bake it in a pre -heated oven at 180 deg C for 15-20 mins. cool and serve.