Always measure gluten-free flours by spooning the flour or the mix lightly into a measuring cup and leveling off the top with the back of a knife. Weighing flours is the best method. I don't have weight measurements for all my recipes yet.
It is not necessary, but a best practice, to stir or sift flours, starches, gums, salt and yeast or baking powder together so everything is evenly distributed.
Best Practices
Make sure baking soda and baking powder are fresh and far from the expire date.
If a recipe calls for dough to be refrigerated, follow those instructions exactly. The time in the refrigerator will allow the dough to stiffen and absorb more of the liquid so the protein structure can develop.
Ingredients should be at room temperature. Don't panic - it's okay if they aren't.
Some recipes suggest using a food processor to cut butter into dough’s and crusts. If you don’t have a food processor, simply cut butter in with a pastry blender or fork and knife.