All of these make a thick batter and in my opinion add more carbs then you need.
All I do is slice my onions soak them in a 50%cream,
50% water mix. When you take the rings out of the cream/water mix...shake off any drips and then drop them some dry Atkins Bake Mix.
Get them lightly dusted then fry em up.
Very light batter....they taste great.