Oh, my goodness. My friend, Melissa, gave me some sour dough starter about a month ago. I've been nurturing it along and finally decided to make bread this week., inspired by her recipe. It was definitely sour!!! Almost like vinegar. I toasted it and added some jam to sweeten it up. It didn't raise very much. I had cut the recipe in half to make enough for one loaf but then put the dough in two smaller loaf tins. I will have to figure out how to make it a little less tart next time. Wow!