Sieve the flour,baking powder, baking soda and salt in a large bowl

In a bowl take milk and add vinegar stir and keep aside for 10 mins. Then add melted butter and this milk to the flour to make a dough. Knead and keep it for 10 mins covered

Filling :- In a bowl mix butter, brown sugar and cinnamon powder, make a paste keep aside

Now roll the dough in a rectangle and apply the filling evenly on the rectangle and fold it in 3 folds, then press it lightly and make 6 equal parts

Heat a pan with salt for 10 mins,place a coaster and plate,then place the muffin tins on the plate cover and cook for 35 mins