Sift the flours, salt and baking powder together into a bowl.
Add butter and rub it into the flour.
Add water and form the flour into a soft dough. It should not be too sticky or too hard.
Cover the dough with a clean kitchen towel or cling film and let it rest for 30 minutes.
Heat a griddle, skillet or tawa over medium heat.
Divide the dough into 10 parts.
Roll each part into a ball.
Using some extra flour, roll one ball into a circle of nearly 8 to 9 inches.
Put it onto the hot tawa. Roast lightly on one side till small brown specks appear. Flip it over and roast the other side.
Keep in wrapped in a tea towel so that it does not get dry.
Repeat the above steps with the remaining dough.