Today is December 6, which is Nikolaus in Germany! Children will put their freshly cleaned boots outside the door, which are going to be filled with sweets and cookies. So for that reason we need cookies today! I decided to make a variation of the most baked, rated, and clicked recipe on this blog, which are the brownie cookies. I decided to make these brownie cookies with sourdough. Yes, you read right. When I heard about this the first time, I thought people were crazy. But then I made these vegan brownies with raspberries and was sold. Since my husband bakes all of our bread, we always, always have sourdough in our house. This in turn means that we often have to throw sourdough as it needs to be fed. Since I liked sourdough in brownies, I figured they it would be as good in brownie cookies.