I tried these today and my batter came out SUPER thick, nothing like the picture or like regular pancake batter... I ended up just adding more milk until it looked right, but I think this resulted in overmixing because I never got bubbles and they just didn't turn out right. (userealbutter.com)
I cheat with the potatoes though, and use a ladle or two of my regular pancake batter to the shredded potatoes and onion to make the latkes. (smittenkitchen.com)