Substituting Gluten Free Flours

Sometimes it's difficult to find the gluten free flours that a recipe calls for, or sometimes you are just simply out of that particular flour that you need so you have to make a substitute.  When substituting flour (of any kind) it is always best to measure by weight and not by cups.  That way you get a more consistent result.

Here is a good explanation as to why this is important:
http://glutenfreegirl.com/gluten-free-holiday-baking-2010/

And here is where you can find a table on the weights of many gluten free flours (click the link at the bottom):
http://www.realfoodmadeeasy.ca/gluten-free-baking/gluten-free-flour-weight-volume-measures/