I've added merely 3 T to a muffin recipe and gotten the same result I would have had in an entire cup of wheat flour. (thebettyrocker.com)
White Flour Alternative - substitute 1 cup of wheat flour for half a cup of coconut flour while doubling the amount of eggs and adjusting liquid to personal preference. (amazon.com)
For improved texture and better keeping qualities, we recommend adding up to 1 Tablespoon of potato flour per cup of wheat flour in your recipes. (kingarthurflour.com)