Make a smooth batter of gram flour, semolina, baking soda, baking powder, salt, citric acid ( lime juice or vinegar ) , oil & water .
Grease a plate with butter & pour the batter to it.
Preheat a wok for 10 minutes with 2 glass of water. Add a stand in it.
After 10 minutes add the plate in the wok & lid it for 30 minutes. After 30 minutes cheack the dhokla with a knife. It can take some more time.
Now in another pan heat some oil or ghee, add black mastered seeds, green chillies & some curry leaves. Let it splutter.
Then add 1 cup of water & sugar in it & boil it for syrup.
Pour this syrup on the dhokla & cut it with your desire shape & enjoy it.