In a bowl add 1 tsp yeast, add 2 tsp sugar,approximately 100 ml water. Mix it well and set it aside for yeast to activate.
Take 400 grams of all-purpose flour, 1 tsp salt, 2 tsp milk powder, and activated yeast solution in a bowl.
Start adding water slowly and knead a soft and slightly sticky dough.
Knead the dough till smooth. Add 2 tbsp oil and knead it further till the dough appears soft and stretchable.
Shape the dough into a ball, cover with a cling wrap and let it double in size.
After about 35-40 mins, remove the cling wrap and knock the dough to remove the excess air from it.
Divide the dough into balls of equal size and roll them on a flour sprinkled counter.
Place these dough balls on a lined tray. sprinkle some dry flour on each ball of dough.
Cover with a kitchen towel and let them rest for another 10 minutes.
After 10 minutes, using a rolling pin, roll each ball of dough into an oval shape.
Apply little water on the rolled dough.
Sprinkle a layer of sesame seeds and coriander leaves on top of this and press them gently so that they stick well.
Make all of the kulchas from the dough balls in the same manner.
Place them on a lined tray, leaving space between them.
Cover the tray with a kitchen towel and set it aside for 15-20 mins or till they double in size.
Preheat oven at 200˙℃.
Bake the kulchas in a preheated oven at 200˙℃ for 20 mins.
Once baked, cool them on a wired rack and brush them with a layer of butter.
Soft and delicious baked kulchas are ready to be served with gravy of your choice.