Pass the flour, baking powder, baking soda through a sieve to mix well. Add salt and sugar and mix
Add yogurt and knead into a soft dough. Add water if needed gradually.
Mix 2 tablespoon oil and knead into a smooth dough.
Cover this dough with a wet cloth for 1 hour. Divide into 12 equal balls. Cover and allow to stand for 10 minutes.
Using oil to roll out the balls. Dusting with flour while rolling will make the flour burn in the oil and stick to the pooris.
Heat sufficient oil in a kadai, and place the rolled poori into the hot oil till it browns.
Turn the poori to the other and cook till brown. Serve hot with chana masala or poriyal.