over mix.
slice the log into 1/3" slices with a sharp knife. put on a parchment lined baking sheet and bake in the center of the oven for 12 to 15 minutes. they will feel slightly soft, don't over bake them.
cool for a few minutes on the pan and then transfer to a rack. if you're going to give them away make sure they are completely cool before you package them. 