I'm always on the prowl for sourdough whatever, since Bertha is always hanging around looking for something to do. I found this in my "to try" recipe file. At the bottom of the recipe it says The Culinary Products Group South San Francisco CA - who knows where I got it from. A quick search on the webbie-web and nothing. Maybe it was from a previous sourdough starter? The recipe uses "proofed" sourdough batter, which I thought was an interesting take on things. While this is not the recipe that I was looking for, it is a keeper. Quick Sourdough Biscuits 2 c proofed sourdough batter (see below) 2 3/4 c flour 1 T baking powder 1 t sugar 1/2 t baking soda 1/2 t salt 1/4 c butter (1/2 stick) 1/3 c milk 2 T melted butter To proof sourdough starter: The night before take 1 cup of sourdough batter and add 1/2 c water. Stir in 1 c flour. Set aside for 8-12 hours. Feed the starter as usual. Your proofed sourdough should be nice and puffy now. Combin...