Heat
buttermilk in a small pan on the stove, or in the microwave,
until bubbles form around the edge. The buttermilk will
curdle. Remove from heat and add water, set aside.
In
food processor, combine flour, baking powder, salt,
yeast, and sugar. Add shortening and whirl until mixture
resembles coarse meal. Add buttermilk and whirl to mix
in.
Knead
the dough until smooth - if you have a large food processor
you can knead in it, otherwise remove and knead about
5 minutes on a floured board.
On
a floured board, roll out the dough to about 3/4 inch
thickness. Use a floured cookie cutter (2 1/2 to 3 inch
round) to cut out the biscuits. Place on greased cookie
sheets, 1 inch apart. Prick tops of biscuits with a
fork.
Cover
biscuits with a cloth and let sit for 30 to 45 minutes.
They don't rise too much at this point, but will rise
more during baking.
Preheat
oven to 400 degrees F. Brush the biscuits with melted
butter and bake for 10 to 12 minutes until lightly browned.
Serve warm.
