If using apple cider vinegar instead of cream of tartar, make sure to mix it with the wet ingredients. (ketodietapp.com)
We also used apple cider vinegar for the acid to soak it in overnight in place of whey / yogurt since we have a milk allergy in our family. (mixedgreensblog.com)
Our favorite now is pulled pork (we just use apple cider vinegar in the slow cooker). (thecollegeinvestor.com)