3For the dough:
Sift the flour ,sugar, baking powder, baking soda and salt into a big bowl.Warm 1 1/4 cups buttermilk just to lukewarm and pour warmed buttermilk into dry ingredients along with 1/4 cup melted butter. Stir to combine. Transfer dough onto a floured surface and knead briefly -- just to smooth it out a bit. Gently roll dough into a 9x13 rectangle. Brush dough with water and sprinkle with 1/2 C brown sugar. Spread the sugar evenly over dough. Roll dough into a log, starting at the longer edge. Pinch the seams closed as well as you can. Now score the roll in 2 inch increments with a serrated knife or a piece of plain dental floss. Cut into slices. Lay slices in cake pan . Bake 23 to 25 minutes until golden brown. remove from oven and invert pan onto a plate and let it sit 15 seconds and then remove the pan.