I needed every drop of buttermilk from the container and very little extra flour when I kneaded it. (epicurious.com)
You could try with some apple puree and a little extra flour, but I have never tried myself so can't guarantee it will turn out quite the same x (deliciouslyella.com)
I didn't have any white chocolate chips on hand, but I added coconut and a little extra flour (I'm at high altitude). (familyfreshmeals.com)