Mix milk & vinegar let it rest 10mins.Mix all the dry ingredients for the dough - Flour, baking powder, baking soda, salt and add the milk + vinegar mixture to this along with the butter and knead a soft dough.
Rest the dough for about 15 minutes Roll out the dough to make a rectange with a thickness of about 1/2 inch cut it into 5 strips.Mix the soft butter along with sugar and cinnamon powder to it. Then apply it on the strips and roll it and place it in muffin cups