remember newbie bread maker here I've got the bread machine down for a white bread recipe that suits us (we love it), and I change up the herbs & such every day. So far we're not fans of whole wheat, but that's ok. I have some excess buttermilk today and was thinking of trying it in the mix, but am wondering if I should just substitute it for the milk in equal ammounts, or is there a ratio I should follow? This is store bought buttermilk. THANKS!